Short animal reaction sounds like this one spread through soundboards, pet videos and meme edits because they are instantly recognisable without any words. The pitbull whee and long ooo howl works in the same way as the screaming sheep sound, turning a familiar animal noise into a punchline for surprise, excitement or stubborn behaviour. Creators keep returning to it because the five-second length fits short clips, the pitch change is easy to cut to a reaction shot, and the sound feels funny even on its own, without needing extra context or explanation.