We are looking at a dog tonight to adopt. She is currently being treated for heartworm. It said on the website that she's not going to be ready for adoption until her treatment is over, but after speaking to our vet they feel comfortable giving her to us earlier. They said that she will have to be inactive for about a month. Our last dog passed away from a tumor in his heart so we do have experience with keeping our dog inactive.... but it was pretty easy because he didn't want to move very much. So how inactive are we talking for a dog with heartworm?