No veins should I keep incubating?

[SJFougere]

Hello everyone. I have two broody hens sitting on eggs. I've been trying to pull out new eggs that keep getting added to the pile but a few have slipped by and I'm wondering if I should put them in the incubator or if they're no good. I dont want to put them in if theyre going to explode. Theyre both pretty dark but no veins.

 

[Mill Chick]

How many days have they been under your hens? It would help a lot to know!

 

[SJFougere]

How many days have they been under your hens? It would help a lot to know!

I'm not sure exactly but it looks like I can see faint marks. And if I marked them that would have been a week ago. Which makes me think they aren't good but this is only my second time hatching.

 

[Mill Chick]

I would say put them in the incubator and candle them in a week, then if there is nothing throw them away. They will not explode in that amount of time unless they have been stored.