Laura, I'm so sorry to hear that you're having peeing problems. When I was having some of these problems, my vet suggested that I buy cat attract litter which as far as I know is only sold at Petsmart. You can also buy it online too. I just added it on top of the old litter and it worked very well.

I've also been using feliway plugins and spray but now I'm using a different type of plug in and spray called Nutri-Vet Pet Ease Pheromone Plus which you can also buy at Petsmart. I also had to add 3 more litterboxes to my household.

I tried Clomicalm on Storm and it helped at first but then it stopped working and it made his very lethargic and sleepy. My vet also recommeneded prozac but I wanted to try a more holistic approach. Now he's on an herbal pill called Calm Spirit Tea Pills and they've really helped with his aggressiveness and grumpiness. It did take about 2 weeks for them to kick in though. I sure hope that you'll be able to find something that will help Tuna. Good luck.