(note: I wasn't sure where this topic fitted so I decided to just put it here. Sorry if i got it wrong!) We have had 3 Isa Brown chooks for about 6 months now and they've been laying eggs for 4 months (i think?). We consistently get 2 or 3 eggs a day and they're always the regular brown ones you can find in the shops (a little bit bigger though). However, just today and yesterday one of our chooks layed a completely white egg that was much larger in length than what we normally get. Although it was bigger, it was much lighter and felt less dense than the other brown one. I have no idea which chook layed it but I was wondering, why the sudden change in colour? We're not too concerned but it's nice to know whats happening. Our chickens are free range and there hasn't been a change in diet. Thanks in advance if you know whats happening.