My 10-year old German Shorthaired Pointer is on Dermaxx, 100 mg, once a day, to relieve pain from a bone tumor. The Dermaxx doesn't seem to be working as well to relieve his pain. Can someone advise whether it is safe to give him the Dermaxx twice a day now? Other than the pain, he is still eating like a horse and appears otherwise well. Thank you.


