
A resident in Christchurch, Dorset alerted the RSPCA after finding it stuck in the peanut-filled feeder.
Insp Graham Hammond said that the squirrel had "eyes bigger than its stomach" and had lost its figure while feasting in the wire-frame last week.
He said: "This was quite an unusual rescue."
"I think this squirrel had eyes bigger than its stomach but after it had stuffed itself with nuts, it had a stomach too large to escape the feeder - one which ironically, was designed to be squirrel-proof," he said.