Hello Marcia, since your cat was a stray she is not used to be trapped so that puts a lot of stress in her. What I personally do with my cat is the following: I set up the carrier somehow in vertical position with the gate open in a room where my cat is not. Make sure your cat WON”T see the carrier at all. Then grab your cat with love, not letting it see the carrier and then put it inside the carrier fast and shut the gate. If this doesn’t work and your cat is still stressful urinating out of stress I suggest you asking your Vet to provide you a sedative for your cat, not too strong just enough to mellow it and go through this process with less stress. Hope that helps!