Filling a competition, as you all know, is when lower skilled horses are entered alongside a horse you are actively trying to BLUP. These fillers close the race out and get you your wins more quickly. Fillers also lessen the likelihood that your horse will lose to another, more skilled, entrant. To completely fill a competition you'll need the help of friends/teammates, or access to other accounts via Account Sharing.
Many players agree that it is poor etiquette to enter a competition that another player is actively filling. By actively filling, I mean that the player is fully closing out the competitions in a timely manner. Jumping in with a better horse when the competition is awaiting one last entrant is frowned upon.
Of course, Howrse itself has no rules to govern this. Technically, you may piggyback off of fillers belonging to another player. Nothing can stop you. It is a dirt-bag thing to do but that's your choice to make. Just don't be surprised when you find yourself getting smashed in the future.
Just remember that etiquette always goes both ways. Too often I see players get their panties in a bunch and claiming someone is "stomping" them or "hijacking" their fills even though they are not making the effort to fully close their competitions.
You cannot leave a competition sitting at 3/5 or 4/5 and expect someone else to finish filling it for you. Complaining when someone beats you in this instance is hypocritical because, of course, you wouldn't get mad at a player who entered your partially filled competition and lost. If a competition has been sitting open for a while it's absolutely fair game.
Don't hijack competitions that are in the process of closing, but don't expect others to do your work for you.
