Yum extra protein! When your baby eats something that you think might hurt him, it's important to call the vet immediately. I have the vet's number and the after hours emergency number in I convenient place, so that even if I'm panicking, which I tend to do, I can find them. If your baby eats a poisonous substance, treating in the first half hour can save his life so time is of the essence. I keep hydrogen peroxide to induce vomiting, and write his dosage amount on the bottle, and have a little plunger-like tool to administer it. I've had to use it twice with Joey, after calling the vet first, but he suffered no after effects from the substances after vomiting.
Dogs can eat things that would make a human sick, and if he ate a whole cup of maggots, I'd be really sick, but one maggot I guess won't hurt him, and if he's doing fine a week later, you have nothing to worry about.
You might be interested in this, it's called maggot cheese.
Maggot Cheese