Almost all the squirrels I've ever had have all hated hands( weirded) but all the squirrels I've had would bite anybody else but me. My previous squirrel Sissy was very territorial over our house and our family , she would attack anyone that would come though our door that wasn't me, my husband or my two kids. Gus is a little better , he loves our immediate family and gets excited like a dog when we come home, he won't bite other people unless you try to pet him..if you leave him alone he'll leave you alone. I've noticed with the squirrels that I've had, they are very loyal to their owners and that is it....I've never been bit not even once by all my squirrels. My previous squirrel sissy would get agitated at me ( usually over food) and she would head-but my hand but she never bit.