I’ve never had issues either! Usually you hear about issues when one goes to the vet and the other doesn’t, but I’ve never had issues with that either.
The car ride in the carrier together is usually good for the bond. And it’s fine that they can’t move around much, it’s actually safer that way. From what you described that sounds like a good size for them.
One thing I like to do after any trip is to just let them hang out in the carrier once I get home for 15-20 minutes before letting them out.
I’m sure they will do fine! Honestly you prob don’t need to deal with water for a 1 hour drive (it tends to leak while driving and most buns won’t drink while the car is moving anyway). You can give them some extra wet salad when you get home if things take a long time at the vets.
.
.
.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.