How frustrating that the vet can't seem to make a definitive diagnosis To chalk it up to the normal progression of age realted illnesses in Boxers is not right! This is a young dog, even for a Boxer!!! I'd definitely try to get Broadway an appt. with another vet. or specialist; perhaps an oncologist. I think a second opinon is definitely in order. Did the vet do any blood work or xrays? My heart breaks for Celine...it's hard enough dealing with a known illness or condition, let alone having to see your precious pup suffer without knowing why or how to treat it. Please tell Celine that the power of Pet Talk prayers are with her and Broadway. I'll be keeping them both in my heart and prayers for sure. Please keep us updated and do encourage Celine to see another vet asap! Sandra