I have to take all 3 of my dogs to the vet tomorrow for their yearly check ups. One of our girl dogs is the reason for the appointment though. Last weekend my husband noticed that she had a large growth on her belly. It's almost the size of a baseball now and it's really hard. I'm hoping it's just fluid that needs to be drained but my husband is thinking it's something serious like cancer. Any vets in here that can maybe shed some light?