My thought is this - if your dogs are happy with what they're eating and it's a quality dog food then I'd leave it alone. My concern is that they might become picky.

We've had 7 dogs in our 54 years of marriage and fortunately none of them were picky eaters. They more or less devoured whatever we gave them. The only time we changed food was when our Black Lab started licking the top of her paws and our Vet suggested we try something a else........and then another something else......and then yet another.

We finally decided the problem wasn't a food allergy but rather as our vet said "it was between her ears." She just had a weird habit.

If it ain’t broke…

I worked in the humane industry and worked with a lot of veterinarians. A couple of the vets that practiced holistic medicine and one of the vets that, in my opinion, was truly exceptional, all had the same theory on why we were seeing more and more food allergies in dogs. Years ago we fed all kinds of foods and scraps and stuff to our dogs. Then we began feeding dry dog food, the same exact food day in day out. At that time, most dogs would become allergic to chicken, so manufacturers started producing lamb based diets. Then people started feeding lamb from puppyhood through adulthood and we started seeing more lamb allergies.

They all switched protein sources regularly. Get a bag of chicken, then a bag of beef, then a bag of lamb, then something else. Some dogs need to switch from one to the other slowly, but dogs who are used to getting different foods all the time seem to do just fine.

I had a dog who became allergic to chicken, and then to lamb and then to beef - it seemed anything I fed him for more than a few months after the chicken allergy manifested itself became another protein that the dog couldn't eat. I started switching between salmon, venison and rabbit each week and the dog never had another issue.

I never again fed the same food consistently. I buy different brand and different protein sources, some with grains, some without . . . I feed 1/2 a can of dog food each day and buy about 10 different varieties, so they get something different every day. Their systems are used to the variety, they don't get digestive issues from changing all the time and not one has had a food allergy since I started doing this. (about 20 years now).

And yes - most dog food is being made with scraps and waste that would typically be considered waste product. Even those bags that claim that the ingredients are human grade aren't being perfectly transparent. Human grade means the butchered animal was USDA inspected and that the plant is USDA inspected, and that the handling and transportation is done in compliance with the production of foods meant to be eaten by humans, not that the meal was made from parts that humans would eat. Non human grade meat products can come from dead, dying or diseased animals.

The foot licking can be due to seasonal allergies.

I know your dog isn't having issues, but when I had a dog with food issues I discovered the Dog Food Advisor HERE It is a third party testing, no money from companies. The free version is great. I did the paid version once. I still refer to the website now and then, even when no issues.

I used to feed Wellness, then the company was purchased and it changed the recipes. Dogs did not seem to like it anymore. So I went to Fromm Four Star and would buy 2-3 variaties so they wouldn't get bored.

Recently my sister got a new puppy and is feeding her Paw Tree (dried, also freeze dried as treats and their treats). It is rated high on Dog Food Advisor. It is not cheap, but she won't weight 4lbs full grown, so it goes a long way.

" Dog Food Advisor HERE " - agree with this site as a good source of information on quality dog foods.

We feed our dogs raw food. There is definitely a price difference between the different proteins.

These raw foods use the muscle, organs, bones of each "protein" with added vegetable and vitamins/minerals. Our dogs are very healthy and the added bonus of feeding raw is they poop a lot less than kibble fed dogs. The only negative is that it is expensive.