Actually most I know who keep giant constrictors (reticulated pythons, rock pythons, burmese pythons, green anacondas, and to a lesser extent, amethystine/scrub pythons), feed their adults every 2-3 weeks, a prey item sized the same as for most snakes, about as thick or a little thicker than the snake is at it's thickest point. Of course at that point your talking about large rabbits, adult chickens, small &/or pot belly pigs. Just about any species of snake will be healthier when fed smaller prey items more frequently. An adult retic could definitely eat a much larger meal, but there is more risk of injury, and a much longer digestion time.
