Shredder bars were originally designed for use in heavy, pen-packed manure. Research shows that, although at one time in the past, up to 90% of manure being spread may have been pen packed, today the material rarely appears, amounting to perhaps about 5% of spread manure. Conestoga’s replaceable, “rooster comb” spreader paddles have superior shredding action, even in whatever small amount of pen-packed material might be encountered in today’s world. So why add all the extra weight and necessary maintenance of a separate shredder bar? Extra weight causes more soil compaction; extra maintenance is costly. If additional shredding action is felt to be needed, Conestoga offers a second beater for just that purpose.