Bettors are people who don't care if they are fighting roosters or horses or whatever, I think what a bettor thinks about is only making bets and having Good options to play win rooster fights, I don't know what criteria must be taken to be able to place bets, maybe there are some technical things that have particular flaws, maybe the spurs or something, because the bigger one I think is better, because then they can do more damage to the other, and Obviously the size, if they are relatively larger roosters , they have more Volume , then it is a plus for the particular rooster to win, although the type of roosters that are used a lot for these are the Ones Called "Cubanitos" because they are Usually light.
Yup, in terms of bettors as long as they can place a bet then they don't care about the process, those who knows how the game works and how they see their opportunities and advantages they will take that chances and will support the side where they think that money can be converted to a win.
Either horses or rosters as long as the chance to continue or please the desires to bet, then expect that it will continue and it will gain bettors support.