corn is a very good feed for carbo loading or anything like oats, rice etc. as long as our rooster is used to it. The fact that we use it every day and our roosters are used to it guarantees that it will not upset their stomach or digestion on fight day.
The most important thing is how to release their stored energy efficiently during the fight to perform well. No matter how much source they have if they can not use it efficiently, they will not perform to their full potential.
Cockfighting is a combination type sport, both performance type (anaerobic) and aerobics. If the fight lasts less than two minutes, it is a performance sports. If it last more than two minutes, it will become a combination of performance and aerobics sports.
The first two minutes of the fight is a very important key factor to consider during conditioning. This is where their fatal blows/cutting and fighting abilities are most needed and will usually determine the end result of the fight.
The glycogen lactic acid biochemical system of the energy metabolic pathways phase that starts from 10 seconds up to around 90 seconds is the time when our roosters slows down due to lactic acid build up in their muscles that causes fatigue and aches. Lactic acid build up is caused by unmetabolized energy source pyruvic acid due to oxygen debt (oxygen is needed to burn fuel) and will be eventually recycled back to glycogen to be used again. This is comparable to a car's gasoline flooded engine, too much influx of energy source that can not be burned as quickly. This will only stabilize after two minutes when our birds starts panting (aerobic) and will start to regain momentum but the energy release is not as fast as in the anaerobic phase.
If you see roosters fight in major circuit competition with speed and power all the way to the drag, most probably the conditioner or persons behind knows the trick. And of course not all secrets are shared.