It's so sweet how adult dogs seem to instinctively understand that a puppy is delicate. We had our adult lab/husky mix when we got a daschund-mix puppy and we were so afraid that she would hurt him - she never had puppies and hadn't been around puppies at all since she left her siblings AND she's generally speaking a pretty clumsy dog so we were really scared for the tiny new baby.
But turns out we had nothing at all to worry about, she fully understood right from the get-go that he was a baby and needed pampering. He was about the size of one of her feet when we got him, but she was so careful we stopped worrying after the first few interactions. Even when he got to be older she would still play very carefully, she'd lay down so he could reach her head and they'd tussle around - well, HE would tussle, she would just sort of swing her head back and forth and make noise to entice him to attack, LOL.
Soooo cute to watch.