whelping

from The Collaborative International Dictionary of English v.0.48

Whelp \Whelp\, v. i. [imp. & p. p. {Whelped}; p. pr. & vb. n.
   {Whelping}.]
   To bring forth young; -- said of the female of the dog and
   some beasts of prey.
   [1913 Webster]