There are natural treatments, but none are nearly as effective as that particular drug. For one, some natural treatments can be contaminated, such as fruit or meat. There are dangers to every possible treatment, but I would follow the vet's advice. You could talk to your vet for natural treatments, but the only thing I can tell you is that since every case is different, your vet probably gave you the best route to take. Good luck and I hope your dog is doing well.