One of my kitties is weeing blood. I have been to ask at the vets and he thinks one of them has Feline lower urinary tract disease. (im not sure yet which of my four cats it is). Most likely one of my male Ragdolls as they are house cats. He has suggested feeding hills prescription. Clean litter boxes at all times (do this already and we have one box per cat... although they all tend to use the same one

) And make sure they drink plenty (not vodka though!

)
Anyone know what else i can do and also any suggestions on finding out which cat it is..i only noticed as one tiddled on the kitchen floor during the night.
Ang