My lab is a year and half and I have started feeding her with eggs and boiled chicken with carrots , green peas and potato. I add this mixture to the dry food and she enjoys her meal. But you need to control the amount. I add small portions to dry kibble. I alternate between chicken veggies and egg. Try with small portions of the above stuff to check how tolerant your dog is. I just add a pinch of turmeric while boiling the chicken and veggies( only carrot,potato and fresh green peas) and scramble the egg without oil. You can try the same.Good luck with that.