As for off color eggs it can happen.You must remember that ameraucanas were created from easter eggers with the addition of other breeds for traits not found in the EEs mostly colors.So recessive traits can pop up.Basically any greenish tint is a sign of something in the past.You can prodigy test your breeders to check for purity of the blue gene.Cross one ameraucana say your rooster with any white or brown or tinted egg breed.Raise about 10 pullets until they all lay.If any lay anything other blue or green then he is carrying only one copy of the blue gene.Same for hens.Once you have a proven breeder on both sexes you should never see pink eggs again.It takes time but it works.I was there when we started the breed.Pure bred just means that they consistantly reproduce the same traits.In some cases it is only consistant 50% of the time as in breeds with lethal genes like ear tufts or the short leg creeper gene.Hope this helps clear this up.The best way to catch the hen is to pen one up on the day the off color egg is due.If the egg is laid in the main flock band that hen and try another.Keep it up until you find the hen that lays the off color. Jerry