A hippopotamus is a mammal, and therefore does not lay an egg. They give birth to live young much in the same way that humans do.
no egg can lay another egg because they have not been born yet when the egg has hatched and it has grew up then they can lay an egg of there own.
If they hide there, they lay the egg there too.
lay egg
It will lay an egg eventually if you put the opposite gender /male a female might lay an egg.
lay an egg. check
in this case you need a ditto ditto will lay an egg with almost anyone. but a male can not lay an egg.
Roosters cannot lay eggs.
they lay more than 1 egg.
lay a egg.
Mew can't lay an egg.
Usually, a hen will lay an egg six months after it has hatched.