I just got a new puppy and trying to introduce my 7 year old 170lb English mastiff to him. The older dog seems very interested wants to be wherever the puppy is. Always wanting to smell him. And when the puppy cries she wants to investigate and she sleeps by his crate. But she pulls away when the puppy licks her face. I’m worried about her stepping on him on accident to just because she is much much larger than him. But I don’t know if her behavior is like motherly instinct let me take care of the puppy or I want to eat this thing. Any advice?