We're trying a new food!!!....AGAIN

here's luma's food history...
Chicken Soup for Puppy Lover's Soul: She hated this food but did okay on it. It's what she was weaned onto by her breeder so we tried to stick her on it but she wouldnt eat it.
Taste of the Wild High Prarie Puppy: Got a sample of it and she loved it, plus it was grain free. She ate it for two or three months. She did great on it and had no skin issues. Then Diamond had the salmonella issue so I swore off all Diamond stuff
Fromm Gold Puppy: This food RUINED her coat. She got dandruff, itching, biting, scabs, sores and horrible eye goop.
Acana Pacifica: Skin issues did not get worse but she never recovered from the fromm issue. I chose it because she had never had a formula with fish, so I gave it a try simply to get her off the fromm.
I think it was the duck in the fromm that started all this mess. Poor baby is miserable. Anyways we're gonna try this Natures variety food, it is grain free kibble with bits of raw mixed in...let's hope she thrives on it! I want my baby to feel better!! This has been such a long ordeal I'm really ready to just home cook for her....may do that if this doesnt work out. All the vet does is put her on an antibiotic or tell me to give her benadryl. Her ears are completely dandruffy, shes got sores from biting on her whole body...its ridiculous.