Don’t worry about the veg unless you see something going on that makes you suspect a real problem. My personal feelings on adding veg and fruits is that I like knowing that mine are getting a variety of antioxidants, just in case. They may not digest every speck of it but they are getting a variety.
I feed twice a day, so 20% of that is about 3 meals, so I feed bones 3 times a week and don’t worry if they don’t eat the usual supplements in those meals. Some people feed raw meaty bones once a day and then for the other meal they make sure that all the days supplements are mixed in.
