I'm glad he improved without it getting to the point of surgery, those crystals are way harder on boys than girls. It can get to the point where it stops a boy completely up and they have to turn his hose into a teacup. 

My giant moose kitty had the bladder crystal problem. He wasn’t feeling well and suddenly he lay down and peed all over the floor. Just lay in it crying. Got him to the vet and they found the crystals. He wasn’t peeing blood but was in terrible pain.
Got him a water fountain and haven’t had a problem since. Vet said make sure he drinks lots of water. Basically makes him pee so much crystals can’t form.
