My BIL did that to his dog only he was just vegetarian. The dog had non stop diarrhea and gas until he gave him decent dog food.
Vegetarians and vegans IMO are a form of anorexia.
I always ask those filthy hippies why we have the teeth we have.
My dog HAD to be vegetarian. She was allergic to everything, including animal proteins. She had special vet vegetarian food she ate all of her (1 day short of) 12 years of allergy hell.
She did well besides the allergies and hip dysplasia. But, the vet diets probably ensure certain supplements are included.
Knew a gal who was vegetarian. Thing was she’d order pepperoni pizza and toss the meat in the trash. EXCUSE ME?!? How the heck is that respecting the animal??? So full of herself and full of bs.
I loved when she ate some pork ‘n beans and loved them. It was a while before someone explained what those white cubes in it were.