Pets should always be sedated before a long trip & have fresh water in their carrier. I agree with Avaitor UA that most Airlines treat pets like baggage without realizing that pets are members of our families. Unless your pet is small (small dog, cat or rabbit) & its carrier can fit inside the cabin it is way too risky to send your pets as baggage. Over the summer Delta & several other airlines banned pets traveling as cargo when 8 dogs died while being shipped. If your big dog needs to travel with you, it may come down to buying a seat for it.