Chicken poop is REALLY high nitrogen fertilizer. It's not appropriate for an indoor grow, but start a compost heap and put your chicken poop on it. Every fall, turn your compost heap and take the bottom, most broken-down layer, and put it into your vegetable garden. Work it in well and let it sit over the winter.
As a bonus, chickens' favorite food is crawling insects. Once your garden is growing well and the plants are too big to be trampled, your chicken will happily kill bugs for you and turn them into more poops.