Dog Show Terms: Breeder, Whelped
Breeder: The breeder of a dog is the owner or lessee of the pack at the time when the pack is bred. Bear in mind that the person who owns the pack when she whelps is not necessarily the breeder and will only be the breeder if he also owned her when she was mated. You might hear the word breeder used in another way. "When purchasing a show dog it is advisable to go to a good breeder." This really means to go to someone who raises dogs as compared with a pet shop or puppy-selling establishment.
Whelped: Whelped means "gave birth to". However, the word is frequently used in slightly different ways. "When is she due to whelp?" means when is she due to give birth to her puppies? "She is in whelp" means she is carrying a litter. You could also say, "He is a good whelp," meaning he is a good puppy.