We have two Sapphire Gems, one Buff Brahma and one (we think) Rhode Island Red. Two of them have been laying for a while -- we think one Sapphire and the Rhode Island are laying -- but we just noticed someone else in the bunch is laying little grey eggs now! (Picture attached.) Any idea what might be happening here? I don't think any of the breeds that we have are known for grey or green eggs, unless the Rhode Island Red is something different. Thanks for the help!