Oh Yes, there are many different ways to determine hatch rate. When someone on Ebay says they have a 90% hatch rate, you really don't know how they are calculating the rate. I was trying to enable(encourage) a new hatching addict.
Realistically, 60 to 80% hatching of those that develop is a good rate. TerriD may have had that kind of rate.
I hatched SG Dorkings from a Local Breeder and all of them that developed hatched. I have not heard of a Leathel Dorking Gene. The problems I have heard about are fertility, so they don't develop and are clear.
Do yours hatch on day 21?
see, i'm a bit different... IMO hatch rate is # of FERTILE eggs vs # that HATCH... if i just counted what made it to lockdown i'm about 100%. but not all eggs that are fertile will develop, IMO, especially if they're shipped eggs...
i had 10 shipped, 5 were fertile, but only 1 made it to lockdown. the rest quit somewhere along the way. now my dorking eggs, i've gotten 14/15 fertile in one group, and 20/20 fertile in the second...
what makes it to lockdown will be another story maybe. the dorkings have a habit of quitting between days 14 and 18. i think there's a lethal gene somewhere in the mix right now, kind of like with other stumpy legged varieties, like Japanese and Scots Dumpy but not as prevalent. then again past problems may be because i set a TON of pullet eggs laid from 6-9 months old... then they took a break so I did too.
and those babies that hatched out between thanksgiving and christmas are starting to lay. i'm resisting setting everything i can.
i'll at least wait until the eggs are closer to 'normal' sized. 8) some are smaller than my bantam cochin pullet eggs!
Is this a Hobby or a way of Life? Chickens: Australorp, Barred & Partridge Rock, Hatchery & Heritage RIR, Golden Comet, Marans, Easter Egger, Silver Gray Dorking, Basque Hen, Partridge Penedesenca, Olive Egger and UofA Blues