I noticed last night that my dog was getting this hard mass on his stomach, and it kept getting bigger and changing colors. I knew that I had to do something about it so I broght him to the vet today. Well, today they told me that he has cancerous cells, and I can't help feeling so bad and thinking that there must be something that I can do for him. Something more. So, I'm hoping that it's not something that huge. So, I feel so bad for my pup that I can't stop thinking about it.