Just so everyone know, the cargo hold that the animals fly in has the same air pressure as the cabin we humans fly in. The pilot also has control of the temp there. I flew with Clover over Christmas, and we'll we were both stressed out, she came through with flying colors. The most stressful of it all was waiting in the ticket line, then for our next flight. I just made sure I had a seat next to the loading area, was the last one to board, did my best to talk to every pilot who was flying my plane, if I couldn't catch them before they boarded, I talked to the agent, who I made verify Clover was on the plane before I boarded, then I would get in line, when I got onto the plane, I would poke my head in the cockpit and hand them a letter stating what seat I was on, that I had a live animal on board who was like my child, and I would appreciate it if they could please double check to make sure she was in the correct cargo hold, and to keep the temp and air pressure like it was here in the cabin. I also included her picture, her departing and arrival information, contact numbers and addresses for her breeder, vet, and contacts at her departing and arrival destintation. On her kennel, I had extra food and water sports top bottle, plus herbal supplements to help with axinety, along with the same type of note, but adding in no one, except for the contacts or me , was authorized to open her kennel at anytime. And to please let the pilot know when she was on board. I made them really cute notes. I also brought brownies for the pilots, plus had cookies taped for the loaders. At my layover I made sure I had time to get her and walk her...give her more water, and another kong stuff with peanut butter. Oh yeah, her kennel had all her info as well, with permeant maker on the sides. I think I was more stressed than she. This is funny now but not at the time, she got a chance to ride on the luggage carasole(sp) at our destintation...she was so cute and so well behaved. One of the pilots even went down to the cargo area and took her picture. YOu just have to be on the ball, I let everyone know there was a live animal on board.