I was going to say, I am more nervous breeding a first-time young bitch than I am breeding an old war horse bitch who knows the drill First time bitches are often nervous and restless, and don't know what to do, whereas the experienced mama has the routine down and does everything right.

The only exception I would say would be older bitches that have gone to hell, are decrepit and horrificly-fat, because their stomach muscles are ruined and they don't have the oomph to push sometimes. But an older bitch at a good chain weight, or even slightly fat, are no problem at all.

To answer Crisis, an older bitch that's first time is no different really from any other first time, so long as she's active and in decent shape.