In years past, my crew will eat a pumpkin....eventually....(30 some odd birds vs 1 large pumpkin) took them something like a month for most of it, then they'd come back to the skins occasionally.
If you go off the premise that chickens, when allowed to forage, will eat things they NEED the nutrients of.....my crew need the potassium (or something else) of bananas but are meeting the nutritional needs that pumpkins supply. Meanwhile certain other groups (
@BY Bob cough) that don't eat bananas are getting that nutritional need met through other finds, so when they're offered, turn their beaks up at them. And why they'll eat something at one point, but refuse the same thing at another: either their nutritional needs don't need what it supplies or the nutritional profile of the food has changed, rendering it unnecessary.
With my crew, I suspect that pumpkins supply something they DO need, but that need is small so a little goes a long way. I haven't gotten any pumpkins yet. I'm waiting for them to go on sale. BTW, Sherlock loves cooked pumpkin but won't touch raw pumpkin. Does the cooking change the nutritional profile or make it more efficient for the body to process?