Has anyone tried this dog food for their Mastiffs? I just bought a 15-lb bag to try from Chewy after reading a good review from a mastiff owner on the site. I'm constantly looking for high quality kibbles that my little girl would like without a topper. On dogfoodadvisor.com website, they rated this particular variety 5 stars. This is the highest yet. They gave the Costco brand Kirkland Signature super premium chicken and rice 4 stars. I'm always looking for dog food that will make the stools nice and firm and not too stinky. Please let me know if you have tried this particular brand and how you (your dog) like it.