I have 2 long haired male Chihuahuas. One is almost 7 years and the other one is almost 3 years. I was a little concerned about giving this ProPowerPlus product to my doggies. The almost 3 year old has a sensitive stomach. Gave 1/4 scoop yo each dog. Directed dosage is 1/2 scoop for their size. Both are 5 lbs 7 oz. Both dogs sleep in our bed at night. In the middle of the night the younger dog vomited a large amount. He’s ok now that the product is out of his system. Now I have to pay for the returns ( they don’t tell you that when you buy it!!!) and pay yo have the comforter cover and comforter cleaned !!!!