[anonymous]

A vegetarian diet is not a good idea for a dog, in general.
Unless the dog has a specific medical condition that requires a vegetarian diet.
In that case, I believe the nutritional needs of the dog may be met by carefully choosing a commercial or prescription food that a veterinarian that has examined the dog approves of.
Or better yet, a veterinary nutritionist (not homeopathic)
Then, frequent wellness checks that include lab work etc.