From what I've been reading on this site, my girls need to be wormed! Some of my hens are 7 years old & have never. Right now we are having some problems with diarrhea, labored breathing in the old girls & low egg production. My question is, How do I decipher the directions given on the product I purchased from Canada? Worm-enda (Levamisole Hydrochloride) is product name. Directions say: Liveweight kg Amt of Water mL Dose mL 3 100 8 Does kg = kilo weight (of chicken) & WHAT does mL =?