Check the values for glyphosphate half-life. Longer than 3 weeks. I have used the stuff a lot in the past. Really looking for other options now.
http://npic.orst.edu/factsheets/archive/glyphotech.html#env
I have rose hips here but not enough consumed to color eggs for any length of time. Surely, since red they contain lost of carotenoids. We have lots of sumac and buckbrush fruit but chickens have troubles reaching those even though fruit set can be very heavy.
Chile and cayenne are similar, I can use all three interchangeably although the paprika is preferred because the dust does not irritate when inhaled or gets in your eyes.