Many middle aged and senior dogs, especially those that are overweight develop benign, fatty tumors under their skin. These growths are usually located on the belly or on the upper legs and are generally harmless. If you notice a lump on your dog, have your veterinarian check it out.  If is a lipoma (benign tumor) and the dog’s movement is not compromised, then no treatment or pet medication is necessary.  It is still smart to keep an eye on the fatty deposit to make sure that it doesn’t grow. Your veterinarian may choose to biopsy the lipoma  every now and then to check for any cancerous changes.  Dogs that have one lipoma are often prone to more.  This doesn’t mean that you should dismiss any new lumps or bumps.  Always ask your vet to give each on a proper exam.