10/01/2025
Breast tumors in dogs, also called mammary tumors, are lumps that appear along the mammary glands on a dog's belly. These lumps can either be benign or cancerous. Risk factors for mammary tumors include being an intact female, or being spayed after having one or multiple heat cycles.
We recommend any owners with intact females, OR ones that have had heat cycles prior to being spayed to check their pets mammary glands frequently. If you feel anything that feels like a frozen pea or a BB pellet, please call for an appointment.
If not surgically removed, sometimes the lump can spread into other parts of the body. If it is a cancerous lump that has metastasized, this can cause shortened life expectancy.