When do you give up on eggs?

[Chicalina]

Today is day 7 of incubation (under a broody) and there are some I think are infertile or not developing. Some I cannot tell as they are mottled.

When do you toss the unviable eggs? I don't want to get rid of any I'm not 100000% sure are duds.

 

[sourland]

If I see no development at day 10, I toss the duds.

 

[Chicalina]

If I see no development at day 10, I toss the duds.

Thanks. I just candled and removed 3 that looked really light inside. My candler is just my phone torch and it's rubbish. I cracked them and they were infertile so I'm pleased with that call. I've left 1 which I'm not sure about. The rest seem good so far. Dark filling half the egg. Can't tell anything else.

 

[Mvan42]

Candle again at around day 16 to 18 and if nothings changes then toss those. If they appear completely dark or mostly except for the air cell day 18 then toss those.

 

[Chicalina]

Surely completely dark except for the air cell at 18 days are the good ones!