It would be irresponsible if they produced puppies that later ended in shelters. A responsible breeder doesn't just produce puppies. They produce healthy puppies that have homes waiting and from tested parents.
Silly question, but what does he eat? My dog had bad breath and the fart was terrible. I changed his food to a grain free and the problem stopped. You might try a food change.
Skip the diet food at the pet store it is not healthy.
I think all vegetables with the exception of mushrooms are good. My dog also get apple,banana, and orange. (no grapes,raisins,onion or garlic.
I feed my dogs only meat and raw vegetables due to a food allergy. The proportions are 2 portions...
If the dog is in pain and really sick you need to let go. This isn't about you, it is about the quality of life for your dog. You must do what is best for him.
If you have to take the maltese in for grooming it is going to up the maintenance. And the quality of food can add to cost.A small dog is cheaper to feed just because it is smaller. I figure vet bills cost the most. On average I spend about $500 per year just on meds and shots,nail trim at $12...