As a family, we have lost 5 dogs, 1 horse and l cat to different types of cancer.  Lymphoma reared itself as a lump on a galgo’s neck, which had spread.  A sarcoma started bleeding under my horse’s tail.  Cancer developed in my cat’s mouth.  2 more galgos had stomach tumours.

Weblink to an interesting article on lumps on your dog.  It doesn’t always mean cancer.