I just started using Bach's Rescue Remedy yesterday, in preparation for getting them neutered. I read in a holistic book for pets that it can be helpful in treating stress, or healing from surgery, etc. In just one day, it really seems to be working! They seem much calmer and less aggressive. People can use it too, and I'm feeling really great using it - have never tried it before. I feel calmer, more balanced, happier, definitely less stressed out.I also was glad to read here that it also can work in preventing cats from spraying! I will continue using it until their surgery, and after, to help them heal. For people who don't know about Bach's remedies, you can buy them at health food stores, or I'm sure on the Web, too. It's a small bottle, and you can add drops to their food, water, or just put a drop on their nose for them to lick off. Costs about $10. (Also called Dr. Bach's Flower Essences - this one is Rescue Remedy).