Comb changing/ losing color

[Shrader]

I've had a few chickens get sick and die recently.
It seemed to be Merricks, and I thought the worst was over.
Now one of my girls' comb has gone from its normal bright red to a dull orange color.
Any idea why this is happening, and what I can do about it?
Thanks.

 

[threehorses]

What were the reasons you thought your bird had Marek's disease?

This comb change could be anything from simple heat stress to something more. Because you've lost other birds, please give us a flock history. Could you please answer the questions from the second sticky of this forum, but answer in this thread?

Also we'll need to know every symptom your other birds were showing, please. Otherwise the question is way too broad and we wouldn't be answering you accurately.

Thanks!

 

[knightnet]

We have the same conditon. The chickens combs are loosing redish color or duller.