So today I collected the eggs. My cousin happened to notice this one was speckled. I have RSL hens that have been laying for almost a year now. Then I have a RSL and cochin who are about 15 weeks old. Could this be a cochin egg?
There will always be an irregular egg layed by a hen. There's nothing to worry about unless she continues to lay eggs like this frequently. I don't think it's from any of your 15 week old hens. 15 weeks old is a bit too young to start laying but it is possible.