The problem with chicken legs only, is it is not a whole prey consisting of organs.
When feeding mammals (I would imagine reptiles are similar) raw, the diet has to consist of portions of muscle, bone, and organ to get the proper nutrients.
Feeding whole chicks or chickens would be fine IMO. You could get them from a local person who is working with a flock of chickens (personal hobby). They need to get rid of extra roosters and many times are too small to bother cleaning for human consumption.
I also think that once bloods, like balls, when they get to a certain size, they do not need as large of a prey item. My 3000 gram adult females never get large rats, mostly small/medium and they stay well conditioned.