The rocker was like always lived with us quickly through Amazon. For our Mini Aussie, the material is still sufficient, but the larger Boxer (ca.38 kg) I do not want to run over my daughter. Then the wood already starts but to creak. Since the rocker equally hard on both sides (opposite our Parkour rocker in Agility in training) we had on one side nor a rail including moored. However, the construction was very simple (2 persons). But I think for the training at home with us, the rocker will prepare some fun.