Cat manure has toxoplasmosis, whipworms, roundworms, pinworms, tapeworms...all transmissible to humans. Same with any other carnivore. It's pretty much all about the parasites. It's not the bacteria...that occurs pretty much in all poop. And it's not about a natural diet...bovines and equines are just about as full of antibiotics as any other animal, probably more so with cows. All poop makes good compost, but don't use carnivore poop because of the parasites. And make sure if you use chicken poop, you compost it a good long time...very high in nitrogen, will burn your plants used fresh. Horse poop is great, but full of weed seeds. Horses only have one stomach, so digest incompletely...many weed seeds make it through unscathed. Cow poop is quite wonderful...well-digested, quick composting. Best is from cows raised organically.