Looking for some recommendations. My lab (32kg, aged 12) is struggling to get in and out of car. I bought a dog ladder and he won't go near it, so I'm thinking of trying some foam steps. I've seen several on Amazon, but some of the reviews say they're only suitable for cats/small dogs. I wonder if anyone has any recommendations for some that are strong enough for my boy. Don't mind spending a bit more to make sure they work for him.