I feed mine veg with every meal. Probably 20-30% veg (mix of carrots, peas, leftover potatoes, brown rice, and whatever's knock-down at Tesco). I'd read that dogs don't have the enzymes in the gut to break down the cell structure in veg like we do so that you've got to boil it up and at least get it softened up for them first, otherwise it just passes straight through barely digested. I boil it long enough that I can smash it all down and mix it through minced chicken/tripe/beef, or whatever I'm feeding. I do mine in big batches, maybe every couple of weeks & freeze them. Very rarely feed