our baby starts crawling any day now and our 4 year old lab who has been an only child for too long suddenly looks huge and i need real advice not pinterest infographics

Setting the scene because every "kids and dogs" article online has been useless to me. Murphy is 4, yellow lab, about 78lbs, has been our only child since he was 9 weeks old. He is the chillest dog any of our friends have ever met. He sleeps through the doorbell. He let our nephew (age 3) pull his ears for an entire weekend visit last summer and just looked at us like "are you going to handle this." He is genuinely the easiest dog in the world.

Our daughter is 8 months old and rolling everywhere and the pediatrician said she will probably be army crawling within 2 weeks based on how she moves on her belly. Up until now Murphy has had a clear picture of the baby: she is the loud thing in the bouncer, she lives in our arms, she is not on his level and not in his space. The moment she starts coming toward him on the floor that picture changes and i have no idea how he is going to read it.

The one real concern i have, and the reason im not just trusting his temperament: Murphy is mildly food guardy in his own bowl. Not aggressive, but he tenses, side-eyes, and once gave a low warning growl when my husband stepped over him while he was eating a frozen kong. We have always given him space when he eats and it has never been an issue, but a crawling baby is not going to know that.

What i actually want to hear, from people who have walked a baby and a previously-only-dog through the crawling phase: what did you wish you had set up two months earlier. What do the trainer articles get wrong. Did anyone use a real family dog trainer for this and was it worth it. Im not interested in "just supervise" answers, im trying to build the actual scaffolding.