My dog will be on prednisone soon...?

I was wondering how do you deal with your dog being on prednisone when you work 8 hours a day. I know the side effects are increased thirst, increased appetite, and frequent urination. I'm really worried about this. My dog has to be on prednisone for 3 months for a mast cell tumor. Do you know if 3 months is considered short term? I pray she don't have major side effects. I have an appointment with a holistic vet on May 6. That's the earliest they can see us. So, I'm going to do the prednisone. I would appreciate any information from anyone who has experienced this and can give me any pointers on what I can do to help my dog out in anyway. We thank you for your suggestions and comments.