HELP!! Need some help with cat issue, possibly related to food switch?? We have 3 cats, one had a urinary blockage awhile ago and was recommended to be prescription food. We tried every brand none of which he would he for more than a few weeks (very picky cat). On a recent trip to the vet we explained that he completely refused to eat the prescription food. They suggested to just get a low magnesium food instead of the prescription food. I got that in dry food and started switching all 3 cats over to it because the other 2 have also had UTI's and other urinary issues in the past. After a week or so all 3 cats have peed somewhere in the house. Could this have anything to do with switching food?? We had this issue 6 months or so ago when i tried to switch food then just went back to their old food (thought it was just a coincidence though). But since it's happening again i'm thinking it must be related. I'm now definitely thinking of switching them all to completely canned food. Do you think this would help our problems? Any help would be appreciated!! Thanks!