Our 3 Yr old ginger male(neutered) has previously had vet visits due to being V stressed by a stray male in our (otherwise quiet) area. Vet gave meds and suggested a water gun any time we see stray. Now we have 2 new cats moved in down below us 6 mths ago, we think our brother and sister cat have seen this as their territory for last few years. He's back to being v stressed, wees blood which vet has known about but it's ramped up again with him weeing around our house. He is terrified of the vet and keeps refusing the medication they have given him. I've tried D manoose for cats hidden in his food, he won't eat, tried UTI special food and again he won't eat. Vet said previously it isn't a UTI but the stress presents as this. He howls to get outside if I try to keep him inside and we are at a loss. We have feliway plug ins. Any help much appreciated. He loves sleeping on us and is so relaxed but I'm so worried about this weeing.