J, yes there are copperheads in Pa and in my countless trips snake hunting I have found a few. The problem is that most people mistake the banded water snake for them and kill alot of watersnakes for no reason. As far as feeding my snakes frozen mice yes I did it because it was convenient. A friend of mine used to be a snake breeder and had roughly 350 snakes so he raised his own mice. He would then frreze them in baggies and I would just pick a bag up once in awhile. All you have to do is drop one in a cup of water and stick it in the microwave for a few seconds. I'm curious, what makes you want to get a kingsnake and what type of kingsnake are you looking for? Arizona, california, gray banded? I just ask becuse I know it's tough to get some species to eat due to the fact that their main diet usually consists of other snakes and lizards. That's not saying most of them won't eat mice but when my friend bred them every once in awhile he would get a few that would only eat anoles and other small lizards. Below is a pick of a grey banded. Personally I think they are some of the neatest looking king snakes.