I know one of my silvers has yellowed a bit. Though it might be from something else like some one pooping on him and staining. The ones I have in VA haven't yellowed. The only time I have found they yellow on my rooster here is getting pooped on (Of course right before a show!). Any body have yellowing in their silvers? Good topic I haven't thought very much about. For any one with lighter colored wyandottes (splash maybe) does the sun bleach their color?