Squirrel Buster Plus Bird Feeder with Removable Cardinal Ring This posigrip ring system has been specifically designed to attract cardinals. These perennial favorites have two very distinct features: small necks and big feet. They prefer gripping a thicktextured perch and facing their food source directly. Cardinals dislike turning their heads to feed. The Squirrel Buster Plus Cardinal Ring perch system allows them to eat facing the seed while providing a secure and comfortable (more…)