That's the pour on.
What size and age of birds do you want to treat?
I've got lots of Dif sizes, I have a bantam girl and boy silkie with two 7 week old bantam chicks, I have a 5 pound cochin (all of those a year old) And I have 3 7 month olds that are around 3-4 pounds each but its just a guess. I'd much rather under-dose them than over-dose them.