Vet Schroeder Tollisan TKK Powder for Canker & GiardiaTKK Powder contains a special combination of Ronidazole, Metronidazole, and a particular galenic which kill all trichomonads, hexamites and giardia in show, roller, and racing pigeons. TKK Powder also helps to treat and prevent resistance problems, as they frequently and repeatedly occur in canker infections. A special digestive tracht ingredient in the TKK powder allows the faeces to roll across the loft floor after only two days. Usable as a