So i brought my male Saint Bernard to the vet tonight. He is still getting hot spots and his ears are getting bad infections. So i brought him to the vets for advice and meds. THey did an ear swab and he has yeast and bacteria.. (expected..) I brought up that i wonder if he has food/grain allregies... She said that most likely not... that its VERY rare that dogs get grain/food allergies. Thats its usually seasonal or enviroment. She said to test a dog for food allergies is very lengthy and expensive. YOu have to start out with 1 meat and 1 carb.(peas or potatos..etc..) and try them on that food for 6-8 weeks...then move on to 1 more meat and carb..etc...etc..etc.. shes betting its seasonal with him.. and she gave me ear meds and wash and a script for benadryl..he has to take like 6 benadryl 2 x day because he weighs about 160lbs... Hes gonna be knocked out! anyways..i always thought that food/grain allergies were more common in dogs... i guess not though. its mostly seasonal.