Sexing quail help

[Agapantha]

I have two quail that are roughly a little over six weeks old. I am having difficulty sexing them. The feathers indicate that they are possibly male but the venting indicates they are female. I read over numerous sites that venting is only effective when they are certain varying ages. Some sites say it only works when they are in breeding season. What age can I sex my quail by venting? Or can you tell me by this photo what gender and type of quail I have? There’s been no crowing nor eggs yet. Thank you

 

[JaeG]

The redness in their chest feathers makes me think males. I've had a few like that as well. As for vent sexing I've never had any luck unless they are sexually active. And even then I recently discovered one I had vent sexed as a male was in fact a female. Thankfully the three males she was in with were gentlemen. She wasn't even missing any head feathers despite living with them for ages. I only realised when I found a couple of eggs - she hadn't laid any until then so she must've been a bit stressed.

 

[Erkenstein]

They look like males to me, too. They'll probably crow before you can tell by vent sexing.