We've had a lot of different animals over the years; the most troublesome was a wonderful little black-and-tan terrier mix we got after she had been abandoned by her people when they shipped out to Germany. She was given to a home that had a German Shepherd and a Husky, both of whom terrorized her.
A few weeks after she came to live with us, a lot of her behavioral problems disappeard, but she was always a problem to travel with. She had very good car manners, laying quietly or sleeping - as long as she was in the middle of the front seat. She rarely disobeyed enough to escape
from the car - until she got to be very old. Then she'd leap from the windows
or scuttle out through a closing door and head for the hills - or just play 'catch me if you can!'
I would never have thought a 15-year-old arthritic dog could have that much energy!
Now, all our faithful dog friends have passed on, and we just adopted two kittens - night and day personalities. It's going to be interesting to see how we cope with two cats and two rats in a 14' Burro!