I too am feeding in my snakes' regular enclosure. Back when I was a kid and had a ball python, he was fed in his enclosure and I never had any problems (except the one time I made the mistake of sticking my hand in there during feeding time, MY mistake, not the snake's fault I was foolish). When I first got my rosy boas I was feeding them in a separate tub, but have since stopped for two reasons: One snake escaped one of these tubs because it apparently didn't latch properly or the snake was still able to push out (was a Critter Keeper type container, snake was found alive and well too), AND because that same snake that escaped kept skipping meals. Since I started feeding the rosys in their normal enclosures, I've had no missed feedings. I think it is a lot less stressful for the snakes to just feed them in their enclosure, and as long as you don't handle food items before handling snakes there should not be any issues.