You can apparently press B to bark in Pet the Pup at the Party.
This is significant in speedruns because a significant portion of the run is RNG based, so having the directional assistance of the bark helps out a lot.
You can see the speedrun here, with my Australian friend, LowFlyingGoat, participating on voice chat while he was live on Twitch:
You can also check out the official leaderboards at Speedrun.com
Download the game for free at Will Herring’s own itch.io page.