We spent some time getting our Frenchie used to this,getting him to jump in to collect treats, having a sleep. All this before we started to pull him around the house and garden. So far were happy with the trailer, but with one minor thing. If the dog rests up against the side of the trailer this rubs on the wheel, over time the material will get damaged. Maybe a wheel guard or an internal board(I'm making one out of plywood) to stop the ass rub! Overall I am more than happy at this price.