New laying hen has pale comb, problem?

[Leavingegypt]

I have 4 hens and 1 roo. 2 hens (production reds) have just started laying yesterday. I noticed that one of them seems to have a pale comb. Before summer really hit both these hens had bright red combs as does my roo. Since the heat has come their combs have been paler, but still a pretty good red.
All my chickens are free-range, coop at night. 20 weeks old tomorrow. Their behavior seems unchanged, except for the laying.
Could laying for the first time take that much out of a hen? This afternoon I gave them all yogurt with some electrolytes/vitamins mixed in. they of course scarffed it down Should I be doing anything else?

 

[Judy]

I'd probably just make sure they have what heat relief you can give: at a minimum, shade and plenty of water. Hopefully, a breeze as well. You might check to be sure the coop is no hotter than the outdoors, depending on your arrangement.

 

[DelDels]

This has been a bad year for worms in some places. I have wormed my youngsters twice already. The heat stress lowers the immune system and the worms flourish. I used Ivomectin and their comb color came up red. Check their stools for runny, too soft or off colors. Sometimes you can see worms but usually not.