Hmmm my dogs get all kinds of veggies and fruits.
They get broccoli, cauliflower, carrots, lettuce, spinach, kale, beans, peas, cucumber, pumpkin, sweet potatoes, tomatoes, apples, grapes, watermelon....the list goes on and on.
Veggies like cauliflower, broccoli, cabbage, bok choy etc need to be fed in moderation as too much can block thyroid function.
Also I read somewhere that dogs should only get baby spinach, but I can't remember why.
I also avoid green peppers as they are a member of the nightshade family (I think that's what it's called) and are bad for dogs with arthritis. My dogs don't have arthritis but I avoid them anyways.

I think most veggies and fruits are good in moderation. And to top it all off, they are great low cal treats!