Native Remedies has started adding corn starch as an inactive ingredient in their Aggression Formula, PetCalm Formula and Amazapet formula that I know of (there are probably many more products that they are doing this with--but it's hard to tell, because they do not list this information on their website and you'll only find out when you purchase the bottle and look at the ingredients).Corn and derivatives are a known allergan for cats!!!! When I gave this formula, both my cats began throwing up the very next day and it continued until I read the ingredients label, found the corn starch, and stopped giving it to them.I was also administering Amazapet to my asthmatic cat. It has always worked very well for her for about the past 4 years. She continued to have breathing difficulties, and it was getting worse to the point of having full-blown attacks. Again, I found the corn starch on the label, stopped giving the product, and she was back to normal within a couple of days. All that time I was giving this product to her, I was making her worse!It is so incredibly unfortunate that they have taken a perfectly wonderful product and ruined it for those cats and dogs with corn allergies. I am so disappointed in the company. I will now have to work to find new homeopathic products.The worst part is that they don't list it on their website, and who would think to read the ingredients on the bottle since they supposedly listed them on their website? What ever happened to truth in advertising/labeling?