I have two POL hens right now, one Delaware and one Lemon Cuckoo Orpington. I also have one Partridge Rock that is probably a year and a half old. The PR lays pretty consistent light tan eggs. Today we found an egg in the poop board without a shell, just a membrane. It was light brown. Is this normal for a first egg? They have access to both grit and oyster shell at all times. I'm not sure who it was from.