Count them!  22 dogs in the picture….all vying for the veggies being thrown off the deck by Don.  You can see pieces in the air.  My dogs LOVE vegetables.  They also love grass, dandelions and young fireweed.  I believe in feeding a diet that is rich in variety, as feeding a straight kibble all of the time can get pretty boring.  Many dog foods these days are incorporating vegetables and fruits into their formulas.  I think this is a good thing.  I have been doing this for years, only in the raw and sometime steamed variety.  We keep a bucket in the refrigerator for any let over scraps and when it is full we disperse it to the crowd.  They always know when Don walks out onto the deck with a bucket that they are going to get treats.  I also pick dandelions and fireweed often and let them chow down.  In the winter I just put it in their dog food.   There is a lot of information on the web about what is good and what is bad for dogs in the line of veggies.  So, no need to throw away those carrot tops or ends, or the lettuce that is slightly wilted.  The dogs will eagerly recycle it all.