You could easily be right, Burra. I am not an expert. The birdsafe.com web site says: "Cork Oak is a safe wood to leave the bark on. Cork oak has very low levels of tannin (far lower then other oaks) and......" which suggests the acorns are relatively sweet. Also note that pigs tend to pig out on acorns and that Portuguese villages used to have the cork oak as a mainstay, one purpose being to fatten up the piggies. I will be planting some myself for that reason.
