Can I breed father to daughter?

[Fwoof]

I'm planning on hatching my own eggs this year, and I'd like to incubate the eggs of my two Sebright/OEGB crosses. I just moved my rooster to their coop (it only contains the Sebright crosses and a senior Buff Orpington) today and he's doing great with them. My two bantams I want to breed are very wary of him but I'm introducing him early so they have time to warm up to him (also because one of the girls is broody and I want her to be laying eggs once she's used to the roo's company). My rooster is very polite with the ladies and I've successfully bred eight chicks with him before (six turned out to be roosters, but oh well they were fun to have ).
One problem: the rooster is these two girls' father. Would breeding father to daughter cause any health issues in the offspring? I'd like to ask before I consider incubating.
Thank you so much in advance!!!

 

[Sic]

Breeding father to daughter is fine.

 

[Fwoof]

Breeding father to daughter is fine.

Thank you!
Today didn't go as well as I had hoped for (my girls were all NOPE whenever my roo even came near them). The only one who was cool with him was my buff orp and she's not even laying eggs anymore!
Anybody please feel free to still share any info on breeding though, I'd appreciate it!

 

[K0k0shka]

If they aren't already related, one inbred crossing probably won't result in a lot of issues. But inbreeding in general will cause problems down the line with chickens like with anything else. I don't know why so many people act like it's no problem. It can be fine for a while, but the more generations you pile up, the higher the chances of problems, and they may not be immediately obvious - subtle things like reduced fertility, reduced lifespan (because of genetic/health problems you can't see) etc. Chickens are so hard to diagnose, and are so notorious for dying "for no reason", that people will often shrug and just write it off as "died of unknown causes", and continue thinking that inbreeding is okay, when that may very well have been the underlying cause. That's why fancy breeds with small gene pools often have so many health issues or die young. Serious breeders will at least get a fresh new rooster every 2-3 generations.