Our dog has quite a few lumps. Vet confirmed they are just fatty and require no treatment.
On the other hand, our last dog died age 12. He had one pretty large lump.
Vet checked and said it was ok. A few months passed and lump was growing. Dog had a seizure one night.
We had to call another vet as our own wasnt answering.
New vet investigated lump with blood tests. It was cancer and dog was given weeks to live.
We found out our original vet hadnt had blood test done. Really neglectful and this vet we discovered has a poor reputation in area.
So you no doubt know to keep checking lumps for growth. Hope your pet will be ok.