That's excessive in "my opinion" but they are show breeders/exhibitors that have beautiful and clean kennels with paid help. I know several show breeders that may produce more than a couple of litters a year but they many champions and still are actively showing and producing some top winning healthy yorkies. However, when one claims to show and you see very little of their breedings in the ring and have that many litters in a year doesn't sound kosher to me. Of course this is my opinion only and I have no clue as to who you are referring too. I haven't had a litter in 3 years and the show breeders/exhibitors in my circle don't have but maybe 1 or 2 litters within a year. But that is just my small circle that I have dealings with. I know alot of show breeders/exhibitors but do not know their breeding program as I do not know them on a personal level.
I would question someone breeding that much and not having them in the ring and claiming to show and it would raise a red flag for me but that's just me
Donna