I saw this today and thought it was interesting. Unfortunate circumstances probably that the research was undertaken in but I think a visual guide like this could be worthwhile to some people.
It’s called the Rabbit Grimace Scale and was developed by lab researchers to determine indicators for levels of pain in rabbits. They also developed ones for mice and rats as well.
Click here to see a page with images and a with a link to the PDF about the scale: https://www.nc3rs.org.uk/rabbit-grimace-scale
Or click here to see a poster version of the scale (a bit small and difficult to read): https://www.nc3rs.org.uk/sites/default/files/Grimace_scales/RGS%20poster%20image_0.png
While we all have pet rabbits here, I think it’s good for people to be able to see visual indicators of pain so that they can know what to look for in their own rabbit. It may help someone determine if their rabbit is unwell, given that we all know how well rabbits can hide illness sometimes, it’s subtle body language like this that can help us make a decision as to whether a vet trip is needed with the potential to save a bunny’s life.