I have a boxer mix (probably with St Bernard) who I got from the pound. He is quite large and at about 7 months he woke up one morning and was unable to get up. The vet thought it was a muscle injury and we treated it as such. About 6 weeks later his right leg became very swollen and x rays showed a fracture that had not healed in an ideal way. After consulting specialists we were going to do surgery to repair but he magically became much better. The very next day I took him back with an excessively swollen leg, this time all the way into the hip, the hitch was it is the other leg. Now we are thinking auto immune disorder. He seems also to not have good control of his back end which frequently collapses. Does anyone know of a good resource where I could read up on this?