A friend’s chicken allergic Greyhound did well on Natural Balance turkey limited ingredient diet. Another friend feeds her Dobes Annamaet Aqualuk and Manitok with significant success – the dogs love it and look great on it.
Pro plan had a fairly recent recipe change of the sensitive salmon (as in last year), and a lot of dogs seemed to go off it. I’m told it may have improved since then.
Unfortunately, diagnoses for things like this *cannot* be made over the internet. She needs to see a vet…especially if she’s been consistently underweight. She’ll need a full exam, with bloodwork and possibly a urinalysis.
I’m sorry. But if you refuse the vet, you’re furthering her illness. Please find a way to pay for it.