I have a 12 year old chihuahua, named Charley, that I have had the privilege of being the second owner of. He had a rough life before he came to me, and I ended up with him on emergency circumstances. A few years ago, Charley was diagnosed with a heart murmur, he lost a lot of ***** around this time. More recently, we found him to have a collapsing trechea. Due to the severity of his murmur, we are unable to surgically repair it. About a month ago, Charley wouldn’t come out from under the bed and couldn’t stop gasping, I figured it was almost time to make that terrible decision. I went to our local holistic pet store to see if there was anything that could calm him and maybe ease his discomfort. She advised me to try this product. In a matter of hours Charley stopped coughing. Within days he was back to his normal self. We now go through the days with Charley playing and hardly coughing. There is no doubt in my mind that this has extended his life. We will never go without this product. Thank you endlessly.