It depends what the 'foreign object' is - if it's just a piece of substrate then it should be fine. My Royal Pythons sometimes swallow pieces of bark chippings when they feed, as it occasionally gets stuck to the rats they eat. They've never had any problems. Same goes for the rest of my reptiles.
I belive that is is the primary consumer.
plant leaves
anykind of snake eats the sunbird okkkay
The snake eats
I would say food chain.
it eats mice
alligator eats it
Nothing eats a cyprus whip snake. It is at the top of the food chain.
a mongoose
it is called an analogy(snake is to hawk because the hawk eats the snake as the dogs eats the cat)
Panther eats deer, deer eats shrub, grass, and a tree. An owl and a hawk eats a mouse and a rabbit, a mouse and a rabbit eats grass. A hawk and an owl also eats a frog, frog eats a cricket, a cricket eats grass. A hawk and and an owl also eat a snake, a snake eats a frog, a mouse, and a rabbit.
The snake is the predator and the mouse is the prey =] I think that was what you was looking for...