I had a search and found rabies in squirrels (rodents generally) is very rare.
(, Wed 29 Dec 2021, 18:23, Reply)
Various Roundworms, viral encephalitis or rabies might fit the symptoms.
Also available, leprosy(!), leptospirosis, Salmonellosis etc.
Dirty little bastards.
(, Wed 29 Dec 2021, 19:53, Reply)
Even without tumours or rabies they can attack when fed by humans www.theatlantic.com/science/archive/2017/06/when-squirrels-attack/531129/
(, Wed 29 Dec 2021, 19:21, Reply)
"Stripe appeared to have been given a reprieve when, later, the RSPCA stepped in to say it would take the pesky critter.
But when the animal charity’s vets examined him, he was euthanised."
Yes, feeding wildlife is rarely a good idea.
(, Wed 29 Dec 2021, 19:58, Reply)