Hen all of a sudden laying small,pale, thin shelled eggs!

[The featherhead]

Since the past 2 days, one of my 2 hens I don’t know which is laying eggs as described in the title, they break once lightly squeezed. They are getting enough calcium in their diet and I very occasionally had this problem in the past but those were only once offs. They don’t look sick at all and they are 4 and 5 years old. CAn someone help me with this. Thanks

 

[MrFluffyandGirls]

Your hens are aging and shell strength thins as they age. If I had to guess it's because of old age.