Because their stomach expands and pushes on their lungs causing them to be un able to breath.
No.
On hills, in the trees, in barns or sheds, in the grass or dirt, etc. Most cattle love to sleep on hills because they can easily see predators approaching from below.
they cant sleep pendejos!!
no, you cant sleep with a stomach during pregnancy
They do sleep on their sides because if they slept face down or face up they would suffocate
...sleep.
they dont
Most any time they feel, depending on the heat of the day or the cool of the night.
Insomnia
They can.
you don't have to i have a cousin who doesn't move when hes sleep.
Is there any reason you think you cant sleep? have you tried valerian tea,