I'm using wild deer droppings in my custom worm chow for my red worm farm, they LOVE IT! I bought a blender at a thrift store dirt cheap & I use it to blend up the worm chow ingredients into a thick goop, the more liquefied it is the easier & faster the worms can process it. I use home made compost, fruit/vegetable scraps that have been spoiled for at least a week (they LOVE yams, carrots, bananas & BACTERIA!), wild deer droppings & a custom mix of wholesome organic inputs (like Soy Bean, Kelp & Alfalfa Meal) & broad-spectrum minerals (Green Sand, Glacial Rock Dust, Basalt Microfines etc.). I put all these ingredients in the blender, add some distilled water if necessary & then blend it into a goop, they go absolutely NUTZ FOR IT! Ive only had my bin going for a little over a month but I already have some of the biggest red worms Ive ever seen in my life. Red worms are typically pretty small, much smaller than night crawlers but my red worms are getting HUGE! They are easily the size of night crawlers & some are even bigger, almost like baby snakes & I'm not exaggerating. My point is that red worms can compost approx 1/2 their own weight a day in organic matter, so the bigger the worms are the more/faster they can produce castings. I got the idea for my custom worm chow from Larry Hall & I can tell you with absolute certainty that it works. When I harvest the castings I'm going to send out a sample for testing, I'm very curious what their composition is & considering their diet I have a feeling they will be loaded with beneficial goodies.