Our birds love the suet also, gnu, especially in this bitter cold. I even give an occasional crumbly seed-filled suet block to the chooks when I know severe cold is on the way.

We had a feeder on a windowsill once, years ago. A young red squirrel decided he needed all of the suet block...spat out the seeds, gobbled the fat. By the end of the day he was one fat-slick little fellow. I wonder how long it took him to clean up his coat?