are you feeding wet or kibble? I have not had this issue with my dogs and they are on kibble as i think the hard helps them express the glands easier and extra fiber helps like organic canned pumpkin and i think with raw feeders the bone helps express the anal glands. I have not heard anything about this food sorry
My cousin just had her dogs glands removed and she has a big dog as he was getting infection after infection and she feeds dry food so it is a tough one. I do not even express my kids glands nor does groomer so i feel real lucky in this area. Hopefully others can help you more