Congratulations that your girls are laying! It is so fun to gather your first eggs.
Several points here:
1. Leave some fake eggs in the nesting box to encourage them to lay there instead of their choice, the dog house (you could also block the dog house).
2. There are differences of opinion on whether you should refrigerate or not refrigerate eggs.
In Europe, it is illegal to wash eggs for sale as it removes the bloom placed on the egg as it is laid. That bloom protects the egg from spoilage (otherwise no baby chick would ever hatch as the egg would spoil way before 21 days).
In Europe they keep unwashed (but coop clean...no fecal material) eggs on the counter at room temperature. Studies have actually shown you can keep eggs fresh for about 6 to 8 weeks at reasonable room temperature.
In America, the FDA requires washing and sanitizing of all eggs for sale. Therefore, having the bloom removed, they must be refrigerated.
Eggs can keep for months in the refrigerator with no loss of flavor or condition. After about 7 weeks on the counter top, it is good to either use or refrigerate.
I'll link an interesting study from Mother Earth news below that answers your question in depth.
http://www.motherearthnews.com/real-food/how-to-store-fresh-eggs-zmaz77ndzgoe
Have fun with your hens and your new eggs.
LofMc