I agree with Patty – I wouldn’t consider a GSP to be a large breed so I wouldn’t worry about the calcium levels. Unless the breeder tells you differently. I wouldn’t do TOTW – it’s manufactured by Diamond. I have used Native in the past and I think it’s a great food and very reasonably priced. I would go with the level IV formula (this is what I used) – it’s rated 5 stars and great for active dogs. Fromm is great too. There’s not reason you couldn’t rotate between the two brands or even try other brands.
