Help please fast!

[Kymberli]

I do feed FT but there was a time when I fed live Petco rodents to my snakes, though they were not losing weight at all back then, and eating the same size rats if not a little bigger.
i fed rats to Cleo from three different stores, but not for about 4 months+ have I done that. (can't stomach it)

Oh, I see. Well then the internal parasite scenario is quite possible! Just because they were not losing weight while you were feeding live, doesn't mean they weren't given internal parasites. It could take a bit of time for the parasites to have a noticeable effect on weight. Same goes for most animals. I've dealt with internal parasites in both horses and dogs.