Collect it into steel 55 gal drums, & add water, & then syphon off the gas that it gives off, into an holding tank, you'll get yerself free USABLE energy...either for an LP stove, or an LP generator that could be used to heat your coop, & or house...google some schematics...Chickens are absoluty astounding renewable resource rich! Meat from the flesh of the bird, feathers for both insulation, & bedding, eggs to eat & to regenerate your flock with & solid waste that can be used as fertilzer for your garden & you can extract the methane from the solid waste, & you can turn 'round & get the necessary documents to start selling both meat & eggs, to supplement your income! Chickens are truly the gift that keeps on giving!