He went 12 months a couple of weeks ago, so still very much a bubby :) Long wait for me to get on his back, I hope it will be worth it!
We do use quite a few TB mares over here with the WB's, just because of the limited access with WB mares. Unfortunately this means we get a few 'backyard breeders' who think a nice WB stallion with 'fix' their TB mare and you end up with 'fugly' foals that sell for less than the stud fee.
Billy is out of a TB mare, but she is really lovely. When they were all classified by the head of the Hano stud book in Germany earlier this year, he absolutely raved over Billy's dam, saying we need to have more mares like her to cross with WB stallions. Fish also crosses exceptionally well with the TBs :) I did want to get something with straight WB on both sides, but Billy was just perfect for me in the end.
Excellent to hear about how Duffy is progressing, what a lovely mare!