3 Orpington hens. 1 is large beautiful large red comb the other 2 were always w/ paler combs but l noticed lately their combs are much paler, all have loose but after research still considered in normal range poop, slowed egg production 1 maybe 2 eggs every few days. All still seem to be alert & happy. I'm new to chickens & just feel something is just off. I've been putting ACV in water & dusted with DE even though I saw no sign of parasites . Am I being overly concerned.