Thank you so much for the answer! The veterinarian says that there's no need of surgery now, and she is going to reduce the prednisone to 5 mg every 48 hours and take out the furosemide, and she said that here in Brasil, surgery is not a good option because we don't have good results here... I would like a second opinion but it's not easy to find a veterinarin who is able to deal with this kind of disease here..
Hi Tatiana, no need to apologize for your English at all. Have you taken a look at the articles on SM here (this one on treatment might be especially useful: http://www.dogheirs.com/dogheirs/posts/59-chiari-malformation-and-syringomyelia-treatment)? It's said that SM is a surgical disease, which means that ultimately, surgery is the way to treat this condition, but it really depends on the severity of the symptoms that your dog displays. Some dogs only need medications, while others, like mine, probably wouldn't survive without surgery. Medications are also hard on your dog's system. My dog takes 2.5mg of prednisone every 48 hours; it looks like yours is on quite a high dosage. With respect to your dog's bladder control problem, maybe it's linked to the amount of furosemide being taken? This is a diuretic, and frequent urination is a side effect. Also, prednisone makes people/dogs thirsty, so the combination of drugs might be a factor in your dog's problem. What does your veterinarian say about the problem and the severity of your dog's condition?