MacLellan A, Nazal B, Young L, Mason G. Waking inactivity as a welfare indicator in laboratory mice: investigating postures, facial expressions and depression-like states. R Soc Open Sci. 2022 Nov 2;9(11):221083. doi: 10.1098/rsos.221083. PMID: 36340516; PMCID: PMC9627452.
Great question! I’m not sure if it’s directly related to thirst and hunger; that would require solid data to prove. Additionally, in some studies, I’ve come across associations between hunching and various psychological conditions such as Catatonia, autism, and others. So, I believe hunching is a posture or behavior exhibited by animals in many specific brain states."