I'm thinking about taking a rat with me on a cross country bike tour. Does anyone have any experience traveling with a pet rat? I can't take my dogs with me because one has severe separation anxiety and would be impossible to leave outside somewhere while I restock on supplies. The other is an 11 year old pug mix with a heart condition, and she doesn't do well in the heat. Also, bringing a dog would be an extra 40+ pounds which would not be fun for climbing hills. I've always had pets and would like to have a furry friend on the road, but I'm not selfish and don't want to risk their lives. If not a rat, what other small animals would make good traveling companions?