I n my experience, you could be dealing with an allergy. Instead of focusing on what meat is in the food, look at the grain. Try a food that does not contain corn meal. That crap is just that...crap. Filler that goes right through the dog. They can't digest it.
Also, be careful with switching to exotic types of food. My vet always says to feed the most common food your dog will tolerate. For example...feed chicken based food if you can. If your dog develops an allergy, you can always go to lamb and rice. But if you start with kangaroo or fish and potato, you have no where to go.
I feed Kirkland Senior for the old fogies in my house (I many over 7 years old, but I do have a 10 year old great dane that still goes for brisk walks every day) and Nutro for my puppy (1 yr old St. Bernard).
Also, be careful with switching to exotic types of food. My vet always says to feed the most common food your dog will tolerate. For example...feed chicken based food if you can. If your dog develops an allergy, you can always go to lamb and rice. But if you start with kangaroo or fish and potato, you have no where to go.
I feed Kirkland Senior for the old fogies in my house (I many over 7 years old, but I do have a 10 year old great dane that still goes for brisk walks every day) and Nutro for my puppy (1 yr old St. Bernard).