It's really not necessary to transfer the snake for feeding; in fact, I'm willing to bet that the transfer would probably more stressful and make a refusal more likely.

When it comes to feeding, I usually go by the 13-15% of body weight rule. I have a 400 gram BP that just started small rats. If you're not sure how much yours weighs right now and 3 fuzzies is enough, you could start with weaned mice-actually, I'd recommend moving up to rat fuzzies because eventually you will want your BP on rats, and these snakes kind of get hooked on mice. They get chunky and will need the extra size of the prey to be healthy.