Harkers 4 in 1 Soluble is a liquid flock treatment for canker, coccidiosis, worms and external parasites in racing pigeons. Using the dosing syringe included in the pack, add 6.0ml of Harkers 4 in 1 Soluble to 1ltr of fresh drinking water daily, for a period of 5 days. Always use fresh solution daily and do not allow the birds to drink from any other source during the treatment period. It is advisable to treat parent stock 3 weeks prior to breeding and young birds after weaning - do not treat birds less than 8 weeks of age. Repeat treatment before racing and as a preventative measure at intervals of 6-8 weeks, or whenever infection becomes apparent. Harkers 4 in 1 Soluble is available in a 100ml bottle (sufficient for 50 birds). Contains Amprolium Hydrochloride 3.8% w/v, Ronidazole 1.2% w/v and Ivermectin 0.0266%.