I wouldn’t wait until the bitch comes in to do the brucellosis test, because if it turns out either she or the male has a false positive, you want there to be time for the follow-up test which it seems to me took about a week, without the added drama. I believe the usual recommendation is within six months (though I prefer a little more recent than that) for males, or some people do it between each bitch that is bred (though of course the bitch is tested too).
We just went through a breeding with frozen semen via surgical implant, and had the ultrasound yesterday, and four little puppies with beating hearts were seen! Of course there could be more, sometimes it is hard to tell numbers, especially on the really big girls.
We had planned to do fresh chilled ( male is in Chicago and bitch is in NC, travel this time of year is so iffy!), but the male hadn’t been used for a year (he is four years old) so we wanted a semen evaluation, good thing we did as his semen was awful! He had a prostate infection. He has sired three litters out of three tries previously, so if we hadn’t checked we would not have known. Fortunately the breeder had had him frozen previously, they had seven breeding units frozen from the one collection, and the breeder was kind enough to send us a unit.
So freeze that boy, the sooner the better! I encourage everyone to freeze their males while they are young, you will not regret it if you need to use him in the future, anything can happen! Good luck and please let us know how it turns out.
For his semen evaluation, is he going to be picky about the teaser bitch? I had a very aristocratically minded IW named Stuart, who was quite appalled that his teaser bitch was. Black and Tan Coonhound. He refused to perform, so I took him back to the van to think about it. He did, and an hour later had decided she was actually quite charming. I think we got ten breedings from that collection.