My Berner Ricky is almost 6 months and he will not jump into the car. I have to lift him in and out of the car. He is getting quite big and this is getting more and more difficult. I take him to work with me every day so car rides are frequent. Any suggestion? I am nervous of him hurting himself, so I have been reluctant to use treats to encourage him. He will occasionally ask to get on the bed but has only jumped down twice. Is it safe at such a young age to encourage this behavior during his developmental stage?