I THINK NOT!
There's a small decal on the tube, a squirrel in a circle with a line through it.
Obviously, this squirrel can't read.
I put axle grease on the hangers thinking that he'd slip off before getting to the feeder.
But instead, I had to wipe his greasy paw prints off the feeder.
Judging from the time he spent hanging upside down, I'd say he was enjoying a good meal.
Well it's back to the drawing board...