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Assuming people read PAST the first few paragraphs from their Facebook post where they cite the McBride notes and a half page blurb from Sally Everett that was found as Appendix 3 in a text book and also was inconclusive. that was also inconclusive, RWAF wrote in reference to the Medycyna Weterynaryjna research : | Assuming people read PAST the first few paragraphs from their Facebook post where they cite the McBride notes and a half page blurb from Sally Everett that was found as Appendix 3 in a text book and also was inconclusive. that was also inconclusive, RWAF wrote in reference to the Medycyna Weterynaryjna research : | ||
.." The new paper is specifically about rabbits in a veterinary clinic setting. It shows that heart and respiratory rates stay the same or increase in rabbits when they are examined on their fronts, but decrease when they are examined on their backs. Pupil size, another measure of stress, increases when examined on their fronts, but not their backs. Blood glucose remained at a very similar level throughout in both groups. Blood cortisol goes up with handling in both groups, but increases less in those on their backs than their fronts. Rabbits entering a vet clinic are, by definition, already very stressed, so the baseline here is somewhat skewed (this is not a criticism of the paper, just an observation), with heart rates and, in particular, respiratory rates, well above those commonly suggested as "normal". | |||
In summary, during TI in this study: | In summary, during TI in this study: | ||
• Heart and breathing rate drop | • Heart and breathing rate drop | ||
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• The decrease in heart and respiratory rate suggest lowered physiological stress but this doesn’t necessarily equal less emotional stress. | • The decrease in heart and respiratory rate suggest lowered physiological stress but this doesn’t necessarily equal less emotional stress. | ||
And the main concern: there is a difference between lying on their back and “true” TI. Different ways to hold and restrain rabbits have different effects and may induce TI or may not. In her social media posts on this, Dr Harcourt-Brown mentions this too, drawing a distinction between TI and trancing. The author describes carefully putting rabbits into a position on their backs, which is how Dr Harcourt-Brown also puts it. The exact nature of the difference needs further exploration, with some suggestions previously that where rabbits have had TI used in the past are more susceptible to it in future, and whether there is an element of "learned helplessness" present in at least some cases. | And the main concern: there is a difference between lying on their back and “true” TI. Different ways to hold and restrain rabbits have different effects and may induce TI or may not. In her social media posts on this, Dr Harcourt-Brown mentions this too, drawing a distinction between TI and trancing. The author describes carefully putting rabbits into a position on their backs, which is how Dr Harcourt-Brown also puts it. The exact nature of the difference needs further exploration, with some suggestions previously that where rabbits have had TI used in the past are more susceptible to it in future, and whether there is an element of "learned helplessness" present in at least some cases. | ||
This study was limited to a veterinary clinic setting. As vets, we need to incorporate these results into a contextualised care approach, and consider: | |||
• Why we are doing it, for example to facilitate a life-saving diagnostic or therapeutic procedure like obtaining an x-ray. | |||
• If the position is appropriate. For example, it is a good position to take a urine sample from the bladder but not for syringe feeding because of aspiration risk. | |||
• How are we are lying them on their backs, and that it is in a stable and supported way. | |||
• Whether we are inducing a physiologically relaxed response or inducing a state where the rabbit is tense and poising to jump up and run for its life. | |||
• If it is appropriate for that rabbit. While the rabbits in this study appear to undergo a relaxation response, not all rabbits will do that. If the technique doesn’t work for an individual rabbit, there could be serious consequences if they jump and twist. | |||
• That there is no suggestion that this process has any analgesic benefit at all. | |||
The only conclusions we can draw from this study are limited to a veterinary clinic setting and our advice for rabbits in all other settings remains the same. The RWAF aims to give the most up-to-date care advice for rabbits. As they are studied more, there is more evidence, and our advice may therefore change in response. | |||
Richard | |||
Richard Saunders (he/him) BSc (Hons) BVSc FRSB CBiol DZooMed (Mammalian) DipECZM(ZHM) MRCVS | |||
Rabbit Welfare Association and Fund Veterinary Advisor" | |||
===2014 Dorsal immobility response in rabbits, Appendix note === | ===2014 Dorsal immobility response in rabbits, Appendix note === | ||
