Hello, I pulled my hedgehog out to bathe him and noticed this large mass on his back that I have never noticed before. I am afraid it's probably a tumor and cancerous. I am going to call a vet tomorrow but everywhere is closed today. It's large, hard, irregular in shape, feels fixated. There is no redness or heat noted. He is going to be 4 years old in October. I have not noticed any significant behavior changes. Has anyone else ever had a mass on their hedgehog like this before and what did it end up being?