FYI - If you need to get your snake to let go of something (another snake, your arm, etc...) get a cup of hot water and pour it on their head. THEY WILL LET GO VERY QUICKLY! I have been keeping boas for a while and I can't tell you how many times I have gotten bitten and the snake will not let go, hot water comes in very handy.

One option for you is to rinse off the snakes after they are done eating so that all of the rodent smell is off of their body, just like when you clean off a female ball python after she lays eggs.