OK, another reason snakes hesitate (& refuse) is that they've gotten hurt in past encounters. That makes the most sense, since you're feeding live, & it sure
complicates your feeding plan, doesn't it? Just because you weren't aware of it doesn't mean your snake hasn't gotten bit (maybe just pinched-didn't draw blood)
when feeding. Some BPs have been known to reject all rodents of the same color or type after such incidents. It's one of many reasons to get them on f/t.
Ahhhhh I wonder if this is why my frozen rat vendor offers white, dark, and hairless rodents? They were all the same price, and I was like who cares what color they are? But now I get it.
2 BP's, one ratsnake, 2 dogs, 3 cats, 2 small caged birds, 7 chickens, and a toddler in a pear tree