Of course, the answer only applies to girl horses . . . filly.
Old or infertile. Barren would also work if she had never had a foal.
Foals
a horse has babies from mating once (ped)
when the're babies
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Horses can have there babies on land, but if the owner wants there horse to have a baby in a barn or somewhere they would keep it there until the horse has the babies (the owner will know round about what month the baby or babies are coming.)
horse clean their babies by licking all of the slimy stuff and a bit of blood of the babies.
Babies is not a compound word.
1
Amelia never had babies.
it depends
Several examples: (1) Although I think babies are cute, I have never wanted to have one. (2) The three babies started to cry as their mother went out to buy some groceries from the corner shop. (Note: "babies" is the plural of the word "baby.")