I have looked at the mind-boggling list of breeds on this site, and can't see any reference to Isa browns. I was told that the birds I got were Isa browns. They look a lot like Rhode Island reds and yet they don't lay as regularly as the Rhodies I had years ago. They (Isa browns) were 22 months when we got them and never did produce well. We've had them almost a year now and I wonder if they are too old to be still laying. I'm inclined to let them just be pets, but would like to add some fresh layer girls to the mix. I also have a few mixed breeds that a family member bred. Auracana/? whatsits. They lay nice blue/green eggs but again very sporatically. Of 9 hens I only get 2-3 eggs a day. They do get out to forage on the property each day so I wonder if some have stashes out in the rough areas?