Dog lover here. We have had dogs of all sizes and types and RV's of all sizes and types since we've been married. We've had a Maltese, Chihuahua, two Draathars, a Lab, and currently two Rat Terriers. From 8 lbs to 90 lbs. Aside from the walking required while on trips several times a day to clean up of dirty paws, storing of food, consideration of boarding when travel destinations when excursions don't allow pets, the only true negative for us is when a large dog ages. For our big dogs, as they got old, we've had to help them in the truck which required two of us because use of a ramp was difficult. Use of a ramp worked for the RV, but not truck. For that reason we heartily believe the size of your dog changes as you age! Now in our 50's and 60's, we have two dogs under 20 lbs that we can pickup easily. The love and a companionship outweighs even the temporary inconvenience of aging for them. We would never be without a canine companion. So many out there that need good homes. We may occasionally board them like when we toured Mesa Verde or hiked Zion and Bryce, otherwise we adjust our trips and excursions and never leave them in the RV. They are always with us.