Application of Methods to Assess Animal Welfare and Suffering Caused by Infectious Diseases in Cattle and Swine Populations
Abstract
:Simple Summary
Abstract
1. Introduction
- develop a measurement scale for assessing the level of animal welfare and the impact of disease on animal welfare (pain and general discomfort);
- estimate the duration and severity scores for each disease and clinical entity based on expert knowledge elicitation (EKE);
- estimate animal suffering scores for common non-infectious welfare challenges (such as broken femur, lack of access to water, separation of dam and offspring) in pig and cattle production for comparison and perspective;
- combine duration, severity, and frequency into an aggregated suffering score.
2. Materials and Methods
2.1. Overview
2.2. Literature Summary of Diseases and Their Clinical Entities
2.3. Animal Welfare Scoring and Assessment
2.3.1. Expert Knowledge Elicitation of Severity and Duration
Imagine that 1000 animals are affected with this clinical entity for a period with the duration described by duration_q1, duration_q2 and duration_q3, i.e., the interquartile range (q1–q3) and the median (q2). What would be the distribution of the combined severity of the typical signs during this period? Please describe the severity distribution with the 2.5 percentile, the mode (most likely), and the 97.5 percentile.
2.3.2. Disease Occurrence
- annual incidence risk of infection obtained from the literature;
- risk of clinical entity occurring if animal is infected during the risk period, based on expert opinion (H.H.);
- calculation of annual incidence risk of clinical entity (a × b);
- calculation of annual incidence rate of clinical entity (i.e., clinical events per animal year at risk): calculated from c) using the formula
- estimation of the risk period based on expert opinion (H.H.), measured in years;
- calculation of the effective incidence rate (EIR) as
- total number of events = population size (n = 1,000,000) multiplied by EAIR.
- No access to water—cattle. This was considered to occur for 1% of animals annually.
- Broken femur—cows and sows. This was considered to have an EAIR of 0.1%.
- Lying on a concrete floor with no bedding material was considered to occur with an EIR of 1% of dairy cows per day.
- Weather conditions are too hot. Heat stress generally occurs at 22 °C, and it is considered to affect the majority of dairy cattle when temperatures rise above 25 °C. Therefore, we deemed that heat stress occurs in 90% of dairy cows when the temperature reaches 25 °C.
- Separation of cow and calf was assumed to occur once for 95% of calves born to dairy cows, and each cow was assumed to have one calf per year, so the total number of events is equal to the population size × 0.95.
- Weaning piglets at 28 days occurs once in 95% of piglets born, so the total number of events is equal to the population size × 0.95.
- Tail biting has a prevalence of 3% in weaners and finishers, so the total number of events is equal to the population size × 0.03.
- Crating of sows. It was assumed that 95% of the sow population farrow 2.5 times per year, so the total number of events is 2.5 × population size × 0.95.
- Feed restriction occurs 2.5 times per year in 98% of the sow population, so the total number of events is 2.5 × population size × 0.98.
2.4. Aggregation of Suffering Scores Based on Severity, Duration and Occurrence
3. Results
4. Discussion
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Disease | Clinical Entity | Age Group | Typical Signs |
---|---|---|---|
BVD | Transient infection | Calves | Diarrhoea |
Heifers | Diarrhoea | ||
Cows | Diarrhoea | ||
Transient infection with erosions | Calves | Mucosal erosions | |
Heifers | Mucosal erosions | ||
Cows | Mucosal erosions | ||
Co-morbidity | Heifers | Retained placenta | |
Cows | Mastitis | ||
Cows | Retained placenta | ||
Calves | Respiratory disease, diarrhoea | ||
Heifers | Respiratory disease, diarrhoea | ||
Repeat breeding | Heifers | Subclinical | |
Cows | Subclinical | ||
Abortion | Heifers | Abortion early or late after infection | |
Cows | Abortion early or late after infection | ||
Congenital defects | Newborn | Miscellaneous malformations incl. congenital tremor and weak calves | |
PI: unthriftiness | Calves & heifers | Weight loss | |
PI: mucosal disease | Calves & heifers | Severe diarrhoea and erosion | |
IBR | Acute phase 1 | Calves, heifers & cows | Reduced appetite, dullness, salivation, nasal and ocular discharge, lachrymation, conjunctivitis, rapid respiration, coughing and pyrexia. May lead to death |
Acute phase 2 | Diarrhoea and dehydration | ||
Abortion | Cows | Abortion during 2nd and 3rd trimesters | |
MAP | Stage III | Cows | Weight loss/poor condition (BCS 1–2)/chronic wasting |
Intermittent diarrhoea | |||
Emaciation (BCS 0–1) | |||
Stage IV | Cows | Pipe stream diarrhoea | |
Lethargy | |||
Aujeszky’s | Encephalitis | Piglets infected in utero | Weak piglets; shaking/shivering/sudden death |
Encephalitis | Piglets (<3 weeks) | Lethargy; weakness/appetite loss; incoordination/convulsions (vomiting, diarrhoea) incl. febrile response (up to 42℃) | |
Encephalitis | Weaners & finisher pigs (>3 weeks) | Loss of appetite; somnolence; trembling/convulsions; paralysis; high temperature (up to 42℃) | |
Encephalitis | Adult pigs | Incoordination of hind limbs and febrile response (up to 42 °C) | |
Respiratory signs | Weaners & finishers (>3 weeks) | Sneezing/nasal discharge; coughing; dyspnoea | |
Reproduction | Vaginal discharge; mummification; agalactia | ||
PRRS | Re-exposure | Sows | Reproductive problems incl. abortion, still-birth and return to service |
Acute infection | Sows & boars | Anorexia, fever, lethargy, respiratory difficulties, cyanosis | |
Nursery piglets | Poor growth, anorexia, fever, respiratory distress, diarrhoea, anaemia, congenital abnormalities, weakness, ataxia, haemorrhage, immunomodulation | ||
Weaners & finishers | Transient anorexia, respiratory disorders and discolouration of the ears |
Hazard | Age Group | Scenario |
---|---|---|
No access to water—cattle | Cows | Dairy cattle left with no access to water due to broken pipes |
Broken femur—cattle | Cows | Dairy cow falls on slippery floor and is left until euthanised |
Broken femur—pigs | Sows | Sow falls on slippery floor with other sows and is pushed around |
Lying on concrete floor with no bedding material | Cows | Dairy cows resting in a free stall environment |
Weather conditions are too hot | Cows | Warm summer days in Denmark (>25 °C) interrupted by cooler nights with no access to shade during the daytime |
Separation of cow and calf | Calves | Calf separated within 24 h of birth |
Weaning of piglets | Piglets | Piglets weaned 3–4 weeks after birth |
Tail biting | Weaners and finishers | Ongoing and severe tail biting (part of tail bitten off, blood present) |
Crating of sows | Sows | Sows crated in farrowing section (from 1 week prior to farrowing) |
Feed restriction | Sows | Feed provision reduced to 30% of ad lib during gestation. Sows are housed together, but most often feed provision is individual |
Disease | Clinical Entity | Age Group | Typical Signs | 2.5p | Mode | 97.5p |
---|---|---|---|---|---|---|
BVD | Transient infection | Calves | Diarrhoea | 5 | 10 | 35 |
Heifers & cows | Diarrhoea | 5 | 10 | 35 | ||
Transient infection with erosions | Calves | Mucosal erosions | 8 | 14 | 45 | |
Heifers & cows | Mucosal erosions | 8 | 14 | 45 | ||
Co-morbidity | Calves | Respiratory disease, diarrhoea | 2 | 3 | 14 | |
Heifers | Respiratory disease, diarrhoea | 7 | 20 | 56 | ||
Heifers & cows | Mastitis, retained placenta | 7 | 20 | 56 | ||
Repeat breeding | Heifers | Subclinical | 1 | 4 | 6 | |
Cows | Subclinical | 1 | 4 | 6 | ||
Abortion | Heifers & cows | Abortion early or late after infection | 1 | 4 | 35 | |
Congenital defects | Newborn | Miscellaneous malformations incl. congenital tremor and weak calves | 1 | 2 | 3 | |
PI: animals unthrifty | Calves & heifers | Weight loss | 100 | 400 | 700 | |
PI: mucosal disease | Calves & heifers | Severe diarrhoea and erosion | 4 | 21 | 45 | |
IBR | Acute phase | Calves, heifers & cows | Reduced appetite, dullness, salivation, nasal and ocular discharge, lachrymation, conjunctivitis, rapid respiration, coughing and pyrexia. May lead to death | 7 | 42 | 100 |
Calves, heifers & cows | Diarrhoea and dehydration | 7 | 49 | 100 | ||
Abortion | Cows | Abortion during 2nd and 3rd trimesters | 0 | 14 | 30 | |
MAP | Stage III | Cows | Weight loss/poor condition (BCS 1–2)/chronic wasting | 15 | 120 | 240 |
Cows | Intermittent diarrhoea | 15 | 120 | 240 | ||
Cows | Emaciation (BCS 0–1) | 1 | 10 | 60 | ||
Stage IV | Cows | Pipe stream diarrhoea | 1 | 10 | 60 | |
Cows | Lethargy | 1 | 4 | 5 | ||
Aujeszky’s | Encephalitis | Piglets infected in utero | Weak piglets, shaking/shivering/sudden death | 0.1 | 1 | 2 |
Encephalitis | Piglets (<3 weeks) | Lethargy, weakness/appetite loss, incoordination/convulsions (vomiting, diarrhoea) incl. febrile response (up to 42 °C) | 1 | 4 | 8 | |
Encephalitis | Weaners & finishers (>3 weeks) | Loss of appetite, somnolence, trembling/convulsions, paralysis, high temperature (up to 42 ℃) | 1 | 4 | 8 | |
Encephalitis | Adult pigs | Incoordination of hind limbs and febrile response (up to 42 °C) | 1.5 | 6 | 14 | |
Respiratory signs | Weaners & finishers (>3 weeks) | Sneezing/nasal discharge, coughing, dyspnoea | 1 | 4 | 8 | |
Reproduction | Vaginal discharge, mummification, agalactia | 1 | 4 | 8 | ||
PRRS | Re-exposure | Sows | Reproductive problems incl. abortion, still-birth, and return to service | 2 | 5 | 14 |
Acute infection | Sows & boars | Anorexia, fever, lethargy, respiratory difficulties, cyanosis | 1 | 1 | 1 | |
Nursery piglets | Poor growth, anorexia, fever, respiratory distress, diarrhoea, anaemia, congenital abnormalities, weakness, ataxia, haemorrhage, immunomodulation | 2 | 7 | 28 | ||
Weaners & finishers | Transient anorexia, respiratory disorders and discolouration of the ears | 5 | 6 | 7 | ||
Welfare Hazards—cattle | No access to water—cattle | Cows | Scenario: dairy cattle left with no access to water due to broken pipes | 0.25 | 1 | 3 |
Broken femur—cattle | Cows | Scenario: dairy cow falls on slippery floor and is left until euthanised | 0.1 | 0.5 | 3 | |
Lying on concrete floor with no bedding material | Cows | Scenario: dairy cows resting in a free stall environment | 90 | 1000 | 3000 | |
Weather conditions are too hot | Cows | Scenario: warm summer days (>25 ℃) interrupted by cooler nights. No access to shade during the daytime | 1 | 7 | 21 | |
Separation of cow and calf | Calves | Scenario: calf separated within 24 h of birth | 1 | 5 | 12 | |
Welfare hazards—pigs | Broken femur—pigs | Sows | Scenario: sow falls on slippery floor with other sows and is pushed around | 0.25 | 1 | 6 |
Weaning of piglets | Piglets | Scenario: piglets are weaned 3–4 weeks after birth | 1 | 3 | 8 | |
Tail biting | Weaners & finishers | Scenario: ongoing severe tail biting (part of tail bitten off, blood present) | 1 | 5 | 28 | |
Crating of sows | Sows | Scenario: sows are crated in farrowing section (from 1 week prior to farrowing) | 28 | 32 | 45 | |
Feed restriction | Sows | Scenario: feed provision is reduced to 30% of ad lib during gestation. Sows are housed together, but most often feed provision is individual | 80 | 85 | 95 |
Disease | Clinical Entity | Age Group | Typical Signs | IR | TNE |
---|---|---|---|---|---|
BVD | Transient infection | Calves | Diarrhoea | 0.03125 | 31,250 |
Heifers | Diarrhoea | 0.034 | 34,000 | ||
Cows | Diarrhoea | 0.034 | 34,000 | ||
Transient infection with erosions | Calves | Mucosal erosions | 0.006243 | 6243 | |
Heifers | Mucosal erosions | 0.0068 | 6800 | ||
Cows | Mucosal erosions | 0.0068 | 6800 | ||
Co-morbidity | Heifers | Retained placenta | 0.001710 | 1710 | |
Cows | Mastitis | 0.0408 | 40,800 | ||
Cows | Retained placenta | 0.001710 | 1710 | ||
Calves | Respiratory disease, diarrhoea | 0.04691 | 46,908 | ||
Heifers | Respiratory disease, diarrhoea | 0.017 | 17,000 | ||
Repeat breeding | Heifers | Subclinical | 0.001421 | 1421 | |
Cows | Subclinical | 0.001421 | 1421 | ||
Abortion | Heifers | Abortion early or late after infection | 0.013507 | 13,507 | |
Cows | Abortion early or late after infection | 0.013507 | 13,507 | ||
Congenital defects | Newborn | Miscellaneous malformations incl. congenital tremor and weak calves | 0.002 | 2000 | |
PI: animals unthrifty | Calves & heifers | Weight loss | 0.012 | 12,000 | |
PI: mucosal disease | Calves & heifers | Severe diarrhoea and erosion | 0.0036 | 3600 | |
IBR | Acute phase | Calves, heifers & cows | Reduced appetite, dullness, salivation, nasal and ocular discharge, lachrymation, conjunctivitis, rapid respiration, coughing and pyrexia, may lead to death | 0.0279 | 27,900 |
Calves, heifers & cows | Diarrhoea and dehydration | 0.0031 | 3100 | ||
Abortion | Cows | Abortion during 2nd and 3rd trimesters | 0.0007647 | 765 | |
MAP | Stage III | Cows | Weight loss/poor condition (BCS 1–2)/chronic wasting | 0.036 | 36,000 |
Cows | Intermittent diarrhoea | 0.036 | 36,000 | ||
Cows | Emaciation (BCS 0–1) | 0.018 | 18,000 | ||
Stage IV | Cows | Pipe stream diarrhoea | 0.018 | 18,000 | |
Cows | Lethargy | 0.018 | 18,000 | ||
Aujeszky’s | Encephalitis | Piglets infected in utero | Weak piglets, shaking/shivering/sudden death | 0.0001097 | 110 |
Encephalitis | Piglets (<3 weeks) | Lethargy, weakness/appetite loss, incoordination/convulsions (vomiting, diarrhoea) incl. febrile response (up to 42 °C) | 0.000146 | 146 | |
Encephalitis | Weaners & finishers (>3 weeks) | Loss of appetite, somnolence, trembling/convulsions, paralysis, high temperature (up to 42 °C) | 0.00056 | 560 | |
Encephalitis | Adult pigs | Incoordination of hind limbs and febrile response (up to 42 °C) | 0.0008113 | 811 | |
Respiratory signs | Weaners & finishers (>3 weeks) | Sneezing/nasal discharge, coughing, dyspnoea | 0.0001097 | 110 | |
Reproduction | Vaginal discharge; mummification; agalactia | 0.00032 | 320 | ||
PRRS | Re-exposure | Sows | Reproductive problems incl. abortion, still-birth, and return to service | 0.00275 | 2750 |
Acute infection | Sows & boars | Anorexia, fever, lethargy, respiratory difficulties, cyanosis | 0.1 | 100,000 | |
Nursery piglets | Poor growth, anorexia, fever, respiratory distress, diarrhoea, anaemia, congenital abnormalities, weakness, ataxia, haemorrhage, immunomodulation | 0.075 | 75,000 | ||
Weaners & finishers | Transient anorexia, respiratory disorders and discolouration of the ears | 0.05 | 50,000 | ||
Welfare hazards— cattle | No access to water—cattle | Cows | Scenario: dairy cattle left with no access to water due to broken pipes | 5600 | |
Broken femur—cattle | Cows | Scenario: dairy cow falls on slippery floor and is left until euthanised | 0.001 | 1000 | |
Lying on concrete floor with no bedding material | Cows | Scenario: dairy cows resting in a free stall environment | 0.01 | 10,000 | |
Weather conditions are too hot | Cows | Scenario: warm summer days (>25 °C) interrupted by cooler nights. No access to shade during the daytime. | 0.9 | 900,000 | |
Separation of cow and calf | Calves | Scenario: calf separated within 24h of birth | 0.95 | 950,000 | |
Welfare hazards—pigs | Broken femur—pigs | Sows | Scenario: sow falls on slippery floor with other sows and is pushed around | 0.001 | 1000 |
Weaning of piglets | Piglets | Scenario: piglets are weaned 3–4 weeks after birth | 0.95 | 950,000 | |
Tail biting | Weaner & finisher pigs | Scenario: ongoing severe tail biting (part of tail bitten off, blood present) | 0.03 | 30,000 | |
Crating of sows | Sows | Scenario: sows are crated in farrowing section (from 1 week prior to farrowing) | 0.95 | 950,000 | |
Feed restriction | Sows | Scenario: feed provision is reduced to 30% of ad lib during gestation. Sows are housed together, but most often feed provision is individual | 0.98 | 980,000 |
Disease | Clinical Entity | AGE Group | Typical Signs | 2.5p | Median | 97.5p |
---|---|---|---|---|---|---|
BVD | Transient infection | Calves | Diarrhoea | 1 | 3 | 5 |
Heifers & cows | ||||||
Transient infection with erosions | Calves | Mucosal erosions | 3.5 | 5 | 7 | |
Heifers & cows | ||||||
Co-morbidity | Calves & heifers | Respiratory disease, diarrhoea | 3 | 4.5 | 7 | |
Cows | Mastitis, retained placenta | 2 | 5 | 6 | ||
Repeat breeding | Heifers & cows | Subclinical | 0 | 0 | 0.5 | |
Abortion | Heifers & cows | Abortion early or late after infection | 1 | 2.5 | 4 | |
Congenital defects | Newborn | Miscellaneous malformations incl. congenital tremor and weak calves | 1.5 | 4 | 7 | |
PI: animals unthrifty | Calves & heifers | Weight loss | 1 | 4 | 7 | |
PI: mucosal disease | Calves & heifers | Severe diarrhoea and erosion | 7 | 8 | 9.5 | |
IBR | Acute phase | Calves, heifers & cows | Reduced appetite, dullness, salivation, nasal and ocular discharge, lachrymation, conjunctivitis, rapid respiration, coughing and pyrexia. May lead to death | 2.5 | 6 | 8 |
Calves, heifers & cows | Diarrhoea and dehydration | 2 | 3.5 | 5 | ||
Abortion | Cows | Abortion during 2nd and 3rd trimesters | 1 | 3 | 5 | |
MAP | Stage III | Cows | Weight loss/poor condition (BCS 1–2)/chronic wasting | 2 | 3.5 | 5 |
Cows | Intermittent diarrhoea | 1 | 3 | 4.5 | ||
Cows | Emaciation (BCS 0–1) | 5 | 7.5 | 8.5 | ||
Stage IV | Cows | Pipe stream diarrhoea | 3.5 | 5.5 | 7 | |
Cows | Lethargy | 6 | 8 | 9 | ||
Aujeszky’s | Encephalitis | Piglets infected in utero | Weak piglets, shaking/shivering/sudden death | 5 | 7 | 8.5 |
Encephalitis | Piglets (<3 weeks) | Lethargy, weakness/appetite loss, incoordination/convulsions (vomiting, diarrhoea) incl. febrile response (up to 42 °C) | 4.5 | 6 | 8 | |
Encephalitis | Weaners & finishers (>3 weeks) | Loss of appetite, somnolence, trembling/convulsions, paralysis, high temperature (up to 42 °C) | 5 | 7 | 9 | |
Encephalitis | Adult pigs | Incoordination of hind limbs and febrile response (up to 42 °C) | 5 | 6.5 | 8 | |
Respiratory signs | Weaners & finishers (>3 weeks) | Sneezing/nasal discharge, coughing, dyspnoea | 3 | 5 | 6 | |
Reproduction | Vaginal discharge, mummification, agalactia | 1 | 2 | 3 | ||
PRRS | Re-exposure | Sows | Reproductive problems incl. abortion, still-birth, and return to service | 2 | 4.5 | 7 |
Acute infection | Sows & boars | Anorexia, fever, lethargy, respiratory difficulties, cyanosis | 1 | 2 | 3 | |
Nursery piglets | Poor growth, anorexia, fever, respiratory distress, diarrhoea, anaemia, congenital abnormalities, weakness, ataxia, haemorrhage and immunomodulation | 2.5 | 5.5 | 8.5 | ||
Weaners & finishers | Transient anorexia, respiratory disorders and discolouration of the ears | 2.5 | 4 | 6 | ||
Welfare hazards— cattle | No access to water—cattle | Cows | Scenario: dairy cattle left with no access to water due to broken pipes | 1 | 5 | 9 |
Broken femur—cattle | Cows | Scenario: dairy cow falls on slippery floor and is left until euthanised | 6 | 7.5 | 9.5 | |
Lying on concrete floor with no bedding material | Cows | Scenario: dairy cows resting in a free stall environment | 3 | 5 | 6.5 | |
Weather conditions are too hot | Cows | Scenario: warm summer days (>25 °C) interrupted by cooler nights. No access to shade during the daytime. | 3.5 | 5.5 | 8 | |
Separation of cow and calf | Calves | Scenario: calf separated within 24h of birth | 2 | 4 | 6 | |
Welfare hazards—pigs | Broken femur—pigs | Sows | Scenario: sow falls on slippery floor with other sows and is pushed around | 6 | 8 | 9.5 |
Weaning of piglets | Piglets | Scenario: piglets are weaned 3–4 weeks after birth | 2 | 4 | 5 | |
Tail biting | Weaners & finishers | Scenario: ongoing severe tail biting (part of tail bitten off, blood present) | 4 | 6 | 8 | |
Crating of sows | Sows | Scenario: sows are crated in farrowing section (from 1 week prior to farrowing) | 3 | 4 | 6.5 | |
Feed restriction | Sows | Scenario: feed provision is reduced to 30% of ad lib during gestation. Sows are housed together, but most often feed provision is individual | 2.5 | 4.5 | 5 |
Disease/Welfare Hazard | Suffering Score (×1,000,000) | ||
---|---|---|---|
2.5 lower CL | Mode | 97.5 upper CL | |
BVD | 20 | 39 | 65 |
IBR | 2.1 | 8.7 | 18 |
MAP | 17 | 36 | 60 |
Aujeszky’s disease | 0.028 | 0.055 | 0.086 |
PRRS | 2.4 | 7.1 | 15 |
WH Cattle: No access to water | 0.001 | 0.007 | 0.019 |
WH Cattle: Broken femur | 0.002 | 0.01 | 0.024 |
WH Cattle: Lying on concrete floor with no bedding material | 15 | 70 | 162 |
WH Cattle: Weather conditions are too hot | 9.9 | 54 | 119 |
WH Cattle: Separation of cow and calf | 4.0 | 24 | 54 |
WH Pigs: Broken femur—pigs | 0.003 | 0.022 | 0.051 |
WH Pigs: Weaning of piglets | 3.3 | 15 | 32 |
WH Pigs: Tail biting | 0.39 | 2.4 | 5.6 |
WH Pigs: Crating of sows | 94 | 159 | 246 |
WH Pigs: Feed restriction | 217 | 344 | 463 |
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Nielsen, S.S.; Houe, H.; Denwood, M.; Nielsen, L.R.; Forkman, B.; Otten, N.D.; Agger, J.F. Application of Methods to Assess Animal Welfare and Suffering Caused by Infectious Diseases in Cattle and Swine Populations. Animals 2021, 11, 3017. https://0-doi-org.brum.beds.ac.uk/10.3390/ani11113017
Nielsen SS, Houe H, Denwood M, Nielsen LR, Forkman B, Otten ND, Agger JF. Application of Methods to Assess Animal Welfare and Suffering Caused by Infectious Diseases in Cattle and Swine Populations. Animals. 2021; 11(11):3017. https://0-doi-org.brum.beds.ac.uk/10.3390/ani11113017
Chicago/Turabian StyleNielsen, Søren Saxmose, Hans Houe, Matthew Denwood, Liza Rosenbaum Nielsen, Björn Forkman, Nina Dam Otten, and Jens Frederik Agger. 2021. "Application of Methods to Assess Animal Welfare and Suffering Caused by Infectious Diseases in Cattle and Swine Populations" Animals 11, no. 11: 3017. https://0-doi-org.brum.beds.ac.uk/10.3390/ani11113017