Mastocytoma: It usually occurs in the trunk, head and legs of dogs. Tumors are mostly soft or hard, large or small lumps or nodules, accompanied by alopecia areata or extensive alopecia.
-Lipoma: it is common in abdomen, mostly benign, but it will turn malignant with a small probability. Older dogs, bitches and obese dogs are more likely to develop lipomas, while cocker spaniel, Labrador and Du Binquan are also more likely to develop lipomas.
If your puppy has tumor symptoms, it is recommended to consult a veterinarian as soon as possible for professional diagnosis and treatment.