I have three cats the youngest of whom is just over a year old. She has all of a sudden starting peeing (and sometimes pooping) on the stairs in my house. I took her to an emergency vet clinic because we were leaving for Maui for ten days and wanted to make sure nothing was wrong before we left. They were unable to get any urine out of her bladder but suggested a shot of antibiotics since we were leaving early the next morning and I was not sure the pet sitter would be able to give her meds while we were gone, anyway long story short I have been watching her since we have been home and she has peeed on the stairs a few times. My suspicion is that she has become afraid of going into the garage where the litter box is so she is holding it. So I have taken her out a few times when it was quiet and put her in the box to watch her pee and the last two times she did it was like she was spraying like a male cat. I am calling my regular vet in the morning to she if they can fit us in tomorrow but was just curious if anyone had heard of anything like that before. Thanks for any input. 
