Cancer rates are through the roof in dogs. Highly processed dry food is seen as a major contributor by many proponents of fresh food. Purdue University did a study on the effect on rates of bladder cancer in Scotties with the addition of fruit & veg and concluded "that consumption of certain vegetables may prevent or slow the development of TCC (transitional cell carcinoma) in Scottish Terriers." Dogs don't need a lot of fruit & veg (5-10% max), but a little really does go a long way to a healthier life.
Dr. Conor Brady, PhD, Author, Blogger, Lecturer and all round expert in canine nutrition shared a recipe for home made power cubes at our Natural Dog Seminar in Montreux in 2019. Publishing an updated version here with his permission:
A large sweet potato boiled (with skin on) or some porridge oats can be added for hungry dogs. Lightly boiled courgette is also a good, healthy filler for hungry dogs. I play around with the ingredients depending on what I have to hand but roughly follow the principles and it will be great. Mix all ingredients in a large bowl, blend using a hand blender, pour into ice cube trays and freeze. Voila - just pop one on your dog's food daily for a tasty, easy vitamin and mineral boost.