I have been busy helping Grandpa Haxnicks to dig manure into his vegetable plot and learning some of the ins and outs of using various types of animal excrement in the garden. What comes out of the animal and goes into the soil is so much more than a pile of poo. All creatures great and small can provide free plop for your plot that will vastly improve soil texture, boost nutrient levels and give you bigger, better and healthier crops.
If you happen to keep chickens, then as well as eggs you have a readily available source of useful fertiliser. Fresh chicken poo has high levels of ammonia so should be dug into vegetable plots at least 4 months before planting. Or you can add it to a compost heap and let it rot down before using it. It makes particularly good top dressing for blackcurrants and plum trees, but tends to be quite alkaline so not so suitable for acid loving plants such as blueberries, or camellias.
Cow poo is great for improving soil structure. Again, it should be left to rot down in a compost heap or dug in a good few months before planting. Autumn is the perfect time for digging it in, particularly if you want to use it in areas where you might be planning to grow root vegetables in the spring. If you try to grow root vegetables in freshly manured soil the results can be a little alarming. Carrots will grow into multi-limbed aliens, beetroot will go barmy and potatoes go scabby. A great plus point for cow poo is that it has been well digested, passing through multiple stomachs a process that kills off any weed seeds.
Weed seeds are something to watch out for with horse manure. So be sure that it is well aged to give time for any seeds to compost. Another benefit of horse poo is that it is considerably less stinky than chicken or cow. But if you want a completely non-stinky manure then worm poo is your best bet. Obviously, it is going to take a biblical proportion of worms to create the equivalent of a few cow pats, but I am told that you can make worm poo tea out of worm casts from a wormery and feed it to your potted plants!