I agree with what Fox-Gal and Moosmom said. We've been through the same with Fister and in the end we decided for the operation. He will not again block completely, so he can have his favourite food and the treats he likes so much.

If you don't have him operated, I think the only solution is to feed him low Magnesium/Calcium/Phosfor food. Only time will tell whether it works.

Good luck!