Rabies, anyone? When normally docile or timid warm blooded wild animals attack humans or start acting weird, that’s the first thing I’d suspect. Either that or someone had the critter cornered and was messing with it.
I rescued a squirrel, once.
Sweet as could be, for a while.
In her later years, food was delivered unto her via crafty toss or one of us distracting her while the other braved the cage door.
That's just what crossed my mind last Tuesday when I was playing the last hole of golf at a municipal course with an after-work 9-hole league. There was a very "aggressive", i.e. non-timid, squirrel at the ninth tee that apparently had been making a meal of the "tough" plastic armrests of the bench there. It did not retreat at our approach, so I opened my umbrella, and it went behind a tree. In less than a minute, though, it came back and resumed gnawing on the bench. I still don't know what to make of it.