I will restrain her if need be. Not all my bucks appreciate that though.
I'm curious; how well has this worked for you? Many years ago, Domestic Rabbit had an article by someone who got some commercial breeders to gather data for her. They bred their animals as usual, but if a pair didn't breed on their own, they were force-bred and the breeders made a note of that. They then palpated, etc, as per usual. When all the data was collated, they found that, when the rabbits bred on their own, they conceived a litter about 80% of the time. When the rabbits were force-bred, the conception rate was less than 20%; clearly, the rabbits knew something that the calendar didn't. When I breed, I always check vulva color. The color I want to see is cherry red (I have yet to have such a red-hot doe refuse a buck!), but some never get that red, so any doe that shows a rosy hue will get a shot (unless experience with that animal tells me it's a waste of time, because she's not ready yet).
But yeah, by day 33, a pregnant doe should have done
something, if only hay-staching. Of course, does don't read the books (they just eat the pages), so until you have seen what a particular doe does, you can't be sure what is going on with her.