I used to think of dogs eating that way to, but what surprises me today is how sensitive some dogs have become - or maybe they always were, we just care more now - to food. We have a dog that can only eat certain dog foods (or his stomach reacts badly) who, despite this, still gets an upset stomach a few times a year and we have to make him boiled chicken and rice. Laugh all you want, I did initially, but the poor guy suffers and this settles his stomach down. And other than a very, very small amount, table scraps and other human foods crush his stomach. And we know many other rational dog owners with these issues.
You can say, oh, you're babying them, etc., but when the dog is in clear discomfort and exhibiting stomach related symptoms, that just doesn't cut it. Maybe they've been bred too selectively or have been too coddle so some of the toughness is being selected out of their gene pool - they turn over generations much faster than we do - but for whatever reason, the days of house-pet dogs surviving on table scraps seems over - at least for the dog and dog owners in my orbit.
Tell me about it. We have one that had skin problems (rashes, losing hair and constant scratching). After several vet visits and steroid shots we finally had an allergy test done. Fairly expensive. The results came back and she is allergic to Bermuda grass and maple trees. Both of which are outside the front and back door. The foods she is allergic to are too numerous to list but they include chicken, rabbit, wheat, corn, and soy just to name a few. Try finding a dog food without those listed ingredients.
We started her on allergy shots, just as a human would do, decreasing the amount of the medication and the application over a period of time. Also very expensive. As you do FF, I make her food from lean ground beef, carrots, celery and green beans and beef stock. We finally found a hypoallergenic food she will eat occasionally, so that helps.
The allergy medication seemed to reach a point of diminishing returns and with the food allergens taken care of, we took her off the shots with no noticeable reactions. We now give her Benadryl if she seems to be experiencing problems. Much less expensive.