My male lionhead is 5 and keeps getting very sore underneath. He is starting to stand very high on his toes and is not comfortable when urinating - he is also at times having trouble controlling this. The vet has done a test and says he has crystals(calcium). I have placed him on the lowest calcium food and veggies + oxbow timothy hay. Tomorrow, he is going to have xrays to see if it is just sludge which they can hopefully flush out or stones which they will have to remove. Has anyone had this senario before? How successful is it? And any thoughts considering his age? Thanks