
I can't help with the allergy - your vet seems to be covering that okay - but I was wondering why you're diluting the goat's milk?
Cow's milk and goat's milk are high in lactose and lower in protein and fat than bitch's milk. Although supplements can be added to cow's milk and goat's milk to make them more closely approximate bitch's milk, they will still be too high in lactose, which increases the risk of diarrhoea.
At 7 weeks I'd start to get them off the milk completely.