Are these wild caught snakes? If they are then in the wild they go w/o food for longer periods of time and may not be used to the type of prey you're giving them. I have a WC snake that will eat rats if they are left in the enclosure and covered with a towel or blanket to keep light out. I come back in 30 minutes and the rat is gone. My other WC BP hasn't eaten in a month but it IS winter time and she could be reacting to the temperature change. (don't know where you live though) Funny thing...1 of my captive bred snakes will eat everything and 1 is very picky. 1 of my wild caught bp's will eat anything and one won't eat alot. It is frustrating. If it gets to a point where your snake seems to be getting too skinny you could try force feeding. Take her or him to the vet and have them do it if you don't want to try it.