It depends on the grass inside. If the grass has been treated with pesticides, or if other animals have used the grass as a toilet, then you should take them to the vet just incase.
he wont die but will be constipated
she might choke if its a big crumb but the sugar would not do much to her.
One would be crying and throwing his or her guinea pig
she would have to stay there for every food she ate
Nothing
Nothing would happen. You would just get a lot of calcium.
You die.
Nothing good!
YOu die
you would eat fish
it would survive
If you ate human poo, (which you shouldn't) you would most likely get very sick.