Sorry for the delayed reply. The most effective Valbazen (albendazole) dose is 20mg/kg, which works out to 0.08ml per pound. Okay to give your Rhode Island Red sized hens 0.5ml (1/2 cc) orally and repeat in ten days. Smaller birds get less, larger ones get more. Let me know if you need help...
The dose is 0.08ml per pound orally, which works out to about 1/2 cc for a six pound chicken. Anything bigger would need more, smaller birds a little less. Give once orally and repeat in 10 days. It's quite safe, so don't worry about giving a little more than they need.
-Kathy