not as far as i know. the only good thing i can say about a certain pet shop that many of us hate is they only sell kittens that have been fixed. its a shame others dont do it. i love cats but there are far too many around, when i lived in town mine stayed inside at nite, now im out of town they are allowed out at nite because they dont bug anyone & there aren't other cats they can fight with. they catch mice, hardly ever bother with birds & they keep the wild rabbit population down.