Chicken manure is very "hot" compared to other manures. You risk burning your plants if you apply too much fresh chicken manure. I would let it compost for several months so that there is less nitrogen. Keep in mind that the drier the manure, the higher the nitrogen content. As a previous poster stated, you want to go easy on the wood shavings in the garden; they consume a lot of nitrogen as they decompose. Even so, the decomposition process takes a long time with wood shavings. If you let it sit it a compost pile for a year or so, then it is a great idea. Also keep in mind the nitrogen requirement for the plants that you are growing. Beans love nitrogen (and actually fixate their own in the soil!), but garlic or onions growing in overly nitrogen-rich soil will put all their energy into the green shoots at the top and less into the bulb. That being said, composted chicken manure will result in better soil for the vast majority of plants.