Chickens in the Greenhouse
I know people use chickens &/or rabbits as a source of heat in their greenhouses in winter. The biggest problem seems to be ammonia, esp in relation to ammonia-sensitive plants like tomatoes, which can start showing damage at just 12 ppm.
I've heard of using Zeolite (?), which tends to be expensive. Has anyone run across any other kind of simple, low-cost solution to this problem?