For using cow's manure it should be mixed with soil in 1/4 propotion. Then bury it and wait for month. Then you can grow on it.
Chiken's manure you should mix with water. Let it infuse for few days and then water your plants in veg stage.
20gr dry chicken manure for 1 liter of water to insist 2 days. Before use, dilute 10 liters of water per 1 liter of infusion. Carefully undiluted chicken infusion will ruin your plant!!!!