They can, but it's not recommended, especially with cows and calves. Pigs are omnivores, which means they can and will eat other animals. This means that young calves may be at risk of getting killed and eaten by one or two pigs when Momma isn't paying attention.
Cows and horse since they are both big and cows dont do very much so I fugure they wont fight
dogs and chickens
The pig.
Yes
In.
Sea Pens are marine corals who live in clusters on the ocean floor.
Both animals and prisoners were held in underground pens.
outside on top of the pigs
A herd of Highland Cattle is described as being a fold rather than a herd - something to do with the old stone pens used for keeping cattle in known as folds.
The fenced areas or cages that domesticated animals are kept in.
Wax tablets
The Ocean, mainly the Mediterranean
mucking out pens, feeding, keeping the animals alive generally
They all can live in pens.
They didn't have pens. They used feathers and ink. But now days we have pencils, pens, and crayons. But if you are talking about pen like a place for animals . . . I have no clue! But I know they used wood and they might have used nails.