I have a 6 week old grey squirrel who is trempling similar to someone with Parkinsons. Some info about him/situation, he is melanistic, he was found at 3-4 weeks and looked to have fell from a tree straight on to concrete driveway so possible head trauma. He does not shake when sleeping and if you hold his body firmly he can stop. Eats snd poops/urinate well. Just reaching out to see if he could possibly be something other than neurological.