These work great for our rescue Min Pin, she does not like loud noises and is terrified of storms to the point she throws up (we believe she may have been abused in her previous homes before my BF rescued her). Usually we give her one before the storm hits (or fireworks start, etc.) and then an hour or 2 later, we give her another to help calm her nerves. She hates wearing anything so we have never tried a thunder jacket. Before these pills, we would have to hold her close to our body with a pillow over top of her with only her nose exposed in order for her to calm down. These chews have been life saving. The only downside, is the smell is horrible, I have to hold my breath and immediately wash my hands after giving one to her. She seems to like the taste though and I won't take away any stars just based on the smell. Definitely will buy again.