A Small Lump on an 11-Year-Old Jack Russell's Leg
by Ken
First, take a close look to make sure it isn't actually a tick. A tick has tiny legs near the skin at one end, while a skin growth doesn't. If you're not sure, your vet can check.
If it isn't a tick, a small, smooth growth like this is often something benign, such as a skin tag, a wart-like growth or a cyst. It's reassuring that it hasn't grown in three months, but that isn't proof, and some skin cancers can look harmless. Since it's been there about three months, book a vet visit in the next few weeks so your vet can take a quick needle sample.
Measure it and take a dated photo so you can spot any change. See your vet sooner if it grows, changes color, bleeds, becomes itchy or red, or she licks it a lot.
See skin cancer in dogs and warts and skin tags on dogs.
This is general information, not a diagnosis. Please follow your own vet's advice.