Adult mouse right out of the egg is caca - can't tell you how skeptical I am of that - especially after watching Smynx feed her 3 new babies. The tail would likely be hangin out of their mouths - and the girth!!! Ouch. And sometimes even though a snake CAN take injuriously large prey relative to it's size doesn't mean it should be done. Even in the wild snakes can get in over their heads and literally bite off more than they can chew - choking themselves (very rare but docuemnted in a few cases with AfRocks - of course it is fairly difficult to regurge something antlered like a gazelle).