This is correct, though I am quite anal when it comes to dosing.20mg/kg repeat in 10days. Thats about 1ml per 10 lb bird
1 treatment should be fine as a preventative but I go ahead and treat the second time as if they did had worms just as an extra safe guard, doesnt do anything to them negatively.

Valbazen - 1 / 2.2 x 113.6 = 0.08 ml per pound