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How to know if your dog has cancer
Check your dog over regularly for lumps and bumps on the skin's surface or just under the skin.
The goal here is early detection of any tumors that could be associated with cancer. Grooming your dog is a great chance to become familiar with what's normal for its body.
Don't panic if you find a lump. The lump could be a wide variety of things, from a harmless spot or mole to a more serious, aggressive cancer.