From what I know, chickens are not cold weather animals. They originate from Fiji which is a warm weather climate. Your chickens will be most happiest with 65 degree or more weather.

Depending on how big your coop is and how many c...

I agree with what was stated before, stranger things have happened.

Very cute pup though.

If they took the dog to the vet, then the vet would have told them what to do... Sorry sounds fishy to me.

Seek professional help from a trainer.

What kind of dark skin? Is it dry? It could just be the way your dog is. As long as your dog isn't in pain I don't see a reason to get it fixed unless it really is unsightly?

How about a bigger picture?

How long have you had her? Also what is she growling and snapping over? Is it random, toys, or food? I need a bit more info.

Crate train your dog, look it up online.

Treats, lots of love, and patience. That's basically it. Put yourself in their "shoes" when you start feeling frustrated with them and their progress and it should help.

Have you talked to your vet about the issue?