My 3 yr old Corgi has been "off" for over a year -- first he was limping with no visible cause, then he started chasing his tail during the summer (two summers of this, and Pems don't have tails to chase), now he's standing/walking on his hocks rather than his toes. Complete blood panels have been run twice, the first time his protein level was bit high but the second time that was down where it should be. The acupuncturist recommended putting him on a potassium supplement, which we think is what helped with the protein level. He's also on Deramax daily, but he still wants to be curled up in his crate all day. He's lost all muscle tone in his hind end, too, and has trouble walking for more than a few minutes at a time. I've read some reports of the bad effects of microchips in horses (I think they were all in Europe, if that makes a difference) and it just occurred to me tonight that Chance was chipped when he was about 6 months old, and started me wondering if that might have something to do with this mysterious problem. Anyone have ideas where I can find reputable information that isn't based on conjecture or alarmist theories?