I have a question about prey items. Both of my ball pythons have ate nothing but white mice/rats their entire short lives. I went to petsmart to buy some large mice but they did not have white........only black. I know that ball pythons can be picky eaters but so far both of mine are eating well for me as I have had them for several months now. Should I stick with white prey items? I would just hate to spend $10 on mice that he would not eat.