I have two of them! One small - Maltese and one larger - Wheaton. They are both terrified of thunder. I used the tranquilizers on the Wheaton and didn't like the side effect. Besides, sometimes the pill would work AFTER the storm was over :( I taught the big guy to go into the bathroom where it's cozy and dark. I don't have a kennel for him anymore. So, now, if we're not home, they go into the bathroom where its dark and small. If I'm home, I take them up to the bedroom and we all snuggle up under the blankets and I put the TV on. It helps them. I have to put the Maltese under the blankets or he'll try to find a corner to borrow into. I try not to make a big deal out of it - don't want to "over" reinforce it.