The toe issues are usually genetic and not incubation related. That said, I have hatched a couple of breeds that are prone to curled toes and have never had a problem with it. Splayed leg is definitely related to hatching. It usually happens when the chick has to work too hard to get out of the shell. Humidity may be a factor, but I think it has more to do with the chick not absorbing the yolk correctly. They get stuck with an amber liquid and that is yolk left in the shell. Look at your records and see if they are hatching at 21 days. If too early or too late then the problem is incubator temperature. You should also get a thermometer that shows the high and low temps. There could be temp spikes or lows in the night or day if the temp. in the room with the incubator fluctuates throughout the day.Asking for a bit of help here re incubation. I'm relatively new to it as I've previously used broodies. Had a couple of chicks out of over 100 with crooked 'incubator-toes', which apparently is reasonable. However, I seem to have a lot of birds which are 'cow-hocked/knock-kneed' while none of the parents are. Can cowhocks be incubator-caused or is it likely to be a nasty recessive gene. It would have to come from the roo as I put him to girls of 3 different strains. Anyone had similar issues?
Cheers Geoff from Aus
Sticky chicks are also caused by too low of humidity and too high of humidity for the first 18 days too. I try to keep my incubator at 35% and then 65 to 70 at lockdown.
For Splayed leg, make a brace with pipe cleaner, a bandage or vet tape. You can safely breed them since splayed leg is not genetic.
Good hatching!