WHAT IS CYDECTIN® POUR-ON FOR CATTLE & RED DEER? CYDECTIN POUR-ON FOR CATTLE & RED DEER delivers the trusted power of moxidectin, the most trusted, potent and persistent “mectin, in the convenience of a pour-on formulation CYDECTIN POUR-ON FOR CATTLE & RED DEER provides broad spectrum control of internal and external parasites. RECOMMENDED FOR CYDECTIN POUR-ON FOR CATTLE & RED DEER is efficacious against roundworms, lungworm, cattle tick, lice and mites which infect cattle, and lungworm and roundworms of red deer.