One of our chickens has started to lay, this was the first of two eggs we’ve found. They are usually tiny like this when the bird first starts to lay (the scale of the picture is hard to see, but I have small hands, this egg is about half normal size). We have Rhode Island Red chickens, which lay brown eggs. But this first egg looked funny- the brown pigment wasn’t consistent, so it looked like it had been airbrushed on.
I bought the chickens as day-olds around April 10th. So, this is a bit early for the beginning of laying- I would expect it more around 5-6 months of age. Hopefully that means they are going to be prolific layers!