LAST EDITED ON Aug-29-18 AT 11:47AM (MST)[p]Those rings for hanging rugs on a wall are either sown on or they are screwed on.
The screw on type can only be used if the feet areas were reinforced with something , like plywood.
If you can't feel anything hard like wood in the feet or ankle area, then the rings must be sown on.
Hardware of any type needed can be ordered from any taxidermy supply. But many hardware stores carry something similar that will work. A heavy waxed thread should be used for hardware attachment and can be plunged completely through the skin and felt for strength.
Not that hard to do DYI.