Keto diets are low in carbohydrates and high in proteins and fats, they are highly recommended for dogs battling cancer. Cancer largely feeds off of the body's carbs and sugars, which can be overproduced on a kibble or non-species-appropriate diet. How do dogs act when they have cancer? If your dog is starting to display trouble when urinating or is struggling or straining when defecating it could be an infection or a sign of cancer in dogs. Some cancers, in particular bone cancer, show themselves through your dog presenting signs of pain or discomfort such as limping and lameness. what are the first signs of lymphoma in dogs, The most common initial symptom of multicentric lymphoma in dogs is firm, enlarged, non-painful lymph nodes. A lymph node affected by lymphoma will feel like a hard, rubbery lump under your dog's skin. It has been noted that Golden Retrievers, Boxers, Bernese Mountain Dogs, German Shepherds and Rottweilers are generally more likely to develop specific types of cancer than other breeds.