The directions said 1.6 oz per gallon of water. I put close to 2 oz per gallon of water. My birds are fine. Use gloves if you spray the birds and work it into their feathers. I also use poultry dust in the shavings in the nest boxes. Remember it does not kill the pests eggs so weekly repeat sprayings are essential for 3 to 4 weeks.do you still have the link for what worked for you this sounds really promising lol and could you tell me specifically how you used it like if you diluted it or sprayed it directly on the bird. Same with my my bird went through a molt and feather just werent coming back