...and be careful when traveling with them. We took or lab on the family vacation this summer and, on the way there, got caught in some traffic. It was a 90 degree day and she was in her kennel in the pick-up bed (which is black and has a black cap). I stopped at the first rest area after clearing the traffic and she was already heat distressed. We cooled her down and everything turned out OK...but I was educated to the reality of how little it really takes a get a lab sick (from heat).