The Dove and the Crow

No Moral. Suggest us a moral of this fable in comment section.
A Dove shut up in a cage was boasting of the large number of young ones which she had hatched. A Crow hearing her, said: “My good friend, cease from this unseasonable boasting. The larger the number of your family, the greater your cause of sorrow, in seeing them shut up in this prison-house.”