Can wyandottes have single combs or ONLY rose?

[wilkinsfarm2020]

I'm reading conflicting things...
I've been reading that wyandottes can have single combs bc if they continue to have rose they can eventually have low fertility rates?

Anyone wanna chime in?

 

[Frazzemrat1]

If its a hatchery Wyandotte... they can have single combs. Its not within the breed standard, but it does happen with the hatchery birds. And the reason why is that yes, they do throw something else in occasionally to increase the number of eggs they lay, not fertility. A Heritage Wyandotte doesn't lay as much as a hatchery one.

 

[The Moonshiner]

Rose combs are linked to a lower fertility rate.
Hatcheries as well as breeders even SOP breeders often keep single combed birds as breeders to combat the fertility issue.
So Wyandottes should be only rose combed according to the SOP but you will come across single combed ones from just about any place you source them.
Personally I don't get it. I'd rather deal with hatching a few less then hatching more but with a disqualifying trait in some.

 

[fishin_dad]

I purchased 2 gold laced pullets about a year ago and 1 has a rose comb the other has a single comb. My roo tends to favor the single comb hen over the rose comb..