Feeding outside there enclosure is also something you want to avoid, it can cause enough stress that it can lead to refusal, not mentioning that when moving an animal in feeding mode the risk of getting tagged increase.
The problem with petsmart and petco is that they cannot feed live (per company policy) and in many cases they actually assist feed their import since they fail to take F/T willingly (they generally won't tell you this ither). They obviously also do not know what appropriate size prey to feed (fuzzies are way to small, any hatchling is started on hopper and quickly move to adult)Question: Can we try larger frozen/thawed before jumping straight to live or will that set us back again?
Feeding live will entice the snake to eat, and the priority is always to get the animal to eat for you, then once the animal is consistent, at least 5 consecutive meal you can switch to F/T.
Young hatchling are voracious and are very easy to switch especially if kept in optimal conditions.
The right prey size is equal the animal's girth size (widest part of your BP's body)