One of my hens have just started laying, but it's been about a week and they are really tiny eggs, is this normal?
Yes ...sometimes they don't even have a yolk . Just give her a month or so and they will be bigger ...unless she's a banty ! They will even lay soft eggs when they first start laying .
Unfortunately, you need to wait. Their eggs get larger the longer they lay until they reach their max size. I had a Banty who recently started laying and her egg was the size of a Robin's egg. Very small!! Usually referred to as Pullet Eggs (the small ones when they first start). You can eat them just the same.
LOL--the eggs can be soooo tiny...about 1-2 mos. and they increase in size. I scramble tons of small eggs for the dogs also. I have about 200 layers when replacing birds, so I have tons of little eggs. Customers love the small eggs also but I make sure they put on "a little size" before sale.