Some cats will [also] be aggravated just by getting a collar on and that could defeat the reason.” Elements Satchu says that pheromones, rosemary, chamomile, and tryptophan are a few of the top elements to look for, though other solutions also incorporate calming aids like passionflower, colostrum, L-theanine, and jasmine. https://martinugpye.liberty-blog.com/33619600/feline-wellness-snacks-an-overview