Possibly nothing, but you should have a vet check him for bites or exposure to venom.
if a dog eats ants its perfectly fine dogs eat everything
the dog eats poo
Poop
Not much unless he eats too much.
certain death.
The duck will get sick
Rattlesnake Fire happened in 1953.
He won't digest it and it may make it sick.
you should call a vet
it is an overdose, it can give your dog an infection internaly, dont do it
you have to rush it to the closest hospital or vet
Nothing. They are harmless.