My 5 year old beagle/lab mix dog has been diagnosed for quite some time with a mast cell tumor. I am beginning to think it is metasticized (sp?) to his bones now. I am wondering if anyone has ever watched their dogs that have cancer actually change the direction of bones? I know that sounds weird, but Sam's front legs have always been straight. He now has one that is curving outward more like a basset. He doesn't act like the leg hurts at all through normal activities and when it is touched he doesn't react, but the bone seems to be turning? Any ideas why that might happen?