A New Skin Growth on a 10-Year-Old Terrier Mix

We weren't able to see a photo with your question, so we can't tell you what it is. Many growths on older dogs are harmless, such as skin tags, warts, fatty lumps and cysts. But some skin cancers look just like them, and nobody can tell by looking or feeling alone.

A rule many veterinary cancer specialists use is to have any lump checked if it is the size of a pea (about 1 cm) or larger and has been there for a month. Until you can get her in, measure it with a ruler, take a photo with a coin next to it for scale, and note the date. Check it again in 2 to 4 weeks.

Go sooner if it grows quickly, bleeds, opens up, becomes red or painful, or changes color. When you do go, ask for a needle sample (fine needle aspirate). It's usually quick, often done without sedation, and costs much less than surgery. If cost is a worry, ask your vet about a payment plan, or look for a low-cost clinic, humane society clinic or veterinary school near you.

See lumps and bumps on dogs.

This is general information, not a diagnosis. Please follow your own vet's advice.