Old hen?

[Somshine]

I have a 5 something year old OE hen from tractor supply who's really slowing down. She has not laid an egg yet this year. The past few weeks she's been more clingy and hanging around the house and not keeping up with the ranging of the others. But otherwise eating and acting normal. The past two days she's really been kind of staying in the coop though and looking "droopy". I've checked her over many times and can't find anything wrong. She does eat and drink but seems to be in slow motion and kind of stoic. But that's it on symptoms, just like she's slowly run out of gas over the past few weeks. Could this just be old age?

 

[Somshine]

Oh and her comb is darker and floppier.

 

[Somshine]

Seems very similar to how my cinnamon Queens went one by one around four and a half to five years old. But I know they're not long lived birds. I still have one that's five and a half though that hasn't laid this year yet either but she's still up and going strong. But I thought olive eggers were supposed to live longer than comets.