Do you have a Tractor Supply near you? You can get this wormer there on the back wall in the horse section. Empty 3ml empty syringes too are there. Pick up one of these too. Orally dose a standard sized bird (5-7 pounds) with 1/2 ml under the tongue once a day for 4-5 days in a row. Repeat in 10 days and they should be worm free. Always follow up with probiotics for a few days to replentish the good bacteria in the digestive system. 
