Hi Erika,
Not a Mastiff owner… but in the 90’s when I was showing labs my friend showed Mastiffs. At the time she had the top winning female in the history of the breed. Went BOS at Westminster!
About 7 yrs ago?? I went to the nationals with them. When there I asked every breeder I came across what food they thought best for raising their dogs. Everyone of them said Eukaneuba. Eukaneuba was what my friend was feeding too to her show dogs. She said she tried many others but always went back to that brand as her line seemed to do best on it.
When I choose a food for pups I always stay with a company that has veterinary nutritionists on staff, and I want a product that has undergone feeding trials preferable with large/giant breeds.
