Yes, they will eat anything they catch.
ummh... for food? It has to eat something.
If the mouse can fit it in its mouth and not choke on it when it swollows it, then yes, a mouse would eat a seed.
yes. If it's not stinky.
No. They eat insets. A tarantula would eat a baby mouse.
Yes, the cat would probaly kill the mouse then eat it later.
The Alabama beach mouse is one of the only species of field mice that live in coastal areas. They eat seeds and insects.
I am not certain how old is a 'baby' field mouse. They like greens and can forage. A nursling would likely not survive without its mother. You could feed a nursling with a dropper and some baby food, perhaps.
Rattlesnakes specialize in small mammals. They them using sensory organ that detect infrared, or radiant heat, coming off of mammals. A field mouse is a small mammal and would definitely be eaten by a rattlesnake that could catch it.
Field mice eat plants, trees, and pretty much anything else.
Mice don't eat grass. However moose do.
prolly another mouse..