Bad tasting boiled eggs

[JIm762]

I'm getting some eggs that when boiled the white just crumbles when peeled ( the shell comes off easy ) and it tastes sour. These eggs are only two days old and are picked up and put in the frindge each day. The egg shells are solid with no cracks or defects . The diet of the chickens has not changed in several months. I have read a lot of articles on bad eggs but I can't find one on this.

 

[ScratchNbawk]

Hmm, is it only when boiled? I don’t know what could be causing this, but hopefully someone can help.