You can just pay a bit extra and bring your pet in an extra seat in the cabin. I've been doing this for years. Many times I'll often be given 3 seats if there's

You can just pay a bit extra and bring your pet in an extra seat in the cabin. I've been doing this for years. Many times I'll often be given 3 seats if there's an empty row, just to make it more comfortable for me and my cat.