Very light colored yolks

[mdp1965]

I have a Rhode Island Red who has begun to lay very light colored yolks ( a month or so at this point.). The other hen ( a americana) lays normal colored yolks. Both get same food, same coop , no rooster etc. Any explanations. Thanks. Drew

 

[Judy]

Here's one article:

http://www.thepoultrysite.com/publications/1/egg-quality-handbook/31/pale-yolks

 

[Kelsie2290]

Another article lists for individual hens, with what are probably not flock-wide or diet causes.
http://scialert.net/fulltext/?doi=ajar.2011.1.16&org=12
• Worms (Coutts and Wilson, 1990)
• Any factor which inhibits liver function, subsequent lipids metabolism and deposition of pigment in the yolk. For example, mycotoxicosis caused by aflatoxin B1 (Zaghini et al., 2005)
• Coccidiosis, although this is rare in adult hens