How should you prepare for Boss Duck?
Prepare the same confirmed loop first: weapon ready, dog ready, ducks sold into useful upgrades, then test one boss attempt with visible notes. The page does not claim fixed boss numbers until a trustworthy public source verifies them.
For how to kill boss duck in catch 1 billion ducks, the safe answer is to enter the fight only after your normal hunt-and-sell loop is improving. Current public videos show boss interest, while the official Roblox text only confirms the supporting weapon, dog, selling, and upgrade systems.