4 hens, 4 eggs and a shell-less egg?

[Tervuren]

Basically what the title says. I only have 4 chickens and found 4 eggs today plus a shell-less one. Only thing abnormal about the eggs was my Bielefelder’s was outside the nesting box and it looks like she had a shell gland issue with it. All their butts looked normal, though it looks like I need to give my Dorking a sanitary trim. I suppose the shell-less egg could have been laid late last evening after I last looked in on them now that I think of it… How much do I need to worry do you think? All the ladies are just over a year old and started laying between last August and November. All completely normal eggs so far, nothing weird at all. My Bielefelder has been laying like an industrial layer, so if anyone one was to have a problem I’d be side eyeing her…

 

[rosemarythyme]

If it's a one off I wouldn't worry at all. If it becomes a trend then you'll want to see if you can ID who the layer is, though that could be difficult.