Don't beat yourself up over it.... they are VERY hard to keep alive and thriving. We originally rescued 4 from a guy and only one lived and made it to adulthood. And it was looking very iffy for him from time to time. The up side to it is that hopefully mom will be more wary next time with where she takes her babies. It's one of those tough lessons.... but I think at least it has served the purpose of education.
You tried and that's what counts
You tried and that's what counts
