Well I suppose it was all going too well, but I can only hope it's a glitch. Today Loki has lost mobility in his tail, it's just hanging there lifelessly, no wag, no raise, nothing. It's actually almost seemed to be getting caught between his back legs. The boy is Ok in himself. I guess something has moved again, or is pressing on the nerve. He's still full of himself but was crossing his back legs a little more than usual as he set off out this morning. I'm not running to the vet, there is nothing more that can be done, I'll just see how he goes over the next few days.