There may be numerous reasons for this, but probably the most prevalent reason is noise made by pets left behind, usually dogs. If the temperature is or WILL BE 80 degrees or over, it is totally unacceptable. Relying on air conditioners or fans is just too dangerous as they or their utility systems often fail, leaving your pet to suffer fatal heat exhaustion or stroke in less than an hour. I do, however, realize that leaving a pet in a RV in cool weather is acceptable if the animal is otherwise safe, has access to water, and the RV is well-ventilated. Dogs are companion animals and, as such, suffer anxiety when separated from loved ones, a condition known as separation anxiety.
Dogs suffering from separation anxiety can be quite vocal and often destructive.
The purpose of this article is to provide some, but certainly not all, ways to prevent separation anxiety in pet dogs. These tips must be mastered AT HOME, long before you take your next RV trip. Only when your dog is reliable at being left alone at home could you even attempt to leave your dog in a RV alone and then only if it will be a cool day. Do this as part of your dog's training at home, long before attempting to use it on a trip. If your dog does not respond properly, gently but firmly place your hand around the dog's muzzle to essentially close his mouth, and repeat the quiet command.