"I was skeptical about purchasing this product for my 14 year old border collie. She had been going in the house more often and waking me up almost every night to go outside. So I purchased this and the difference is amazing: she hasn't gone in the house for months now and almost never wakes me up in the night. I have had trouble in the past getting my dog to take pills, but this one she takes like a treat! All dogs are different, but this worked well for my dog."