Sloshing and veining in eggs day 18 candling

[only1bgirl]

Three of my six remaining eggs the veins are not clear in them and they appear to slosh around at the tip. Should I cull them before lockdown? They all had clear veins and movement at day 12, these were the eggs that I suspected having doubles.

 

[Lizz9311]

I'm still a novice at candling, but from my understanding at day 18 the chick should be large and filling the eggs so you shouldn't be able to see veins at all. Seeing as you're in the home stretch, I'd probably leave them in for the duration as long as they're not "sweating" or emitting a foul odor.