I have been reading a lot online about mast cell tumors, how to treat them, etc. I have decided to change my dogs diet to the Canine Cancer Diet... low carb, high fat, high protein, homecooked. I have already added fish oil supplement (human grade) I squeeze it out of the liquid capsule and the same for Vitamin E. First... I have read conflicting information about the types of Omegas some say you need 3 & 6, while others say not to Omega 6 because it can cause cancer to grow.