What is normal and abnormal for chickens droppings?

Chickens  produce 2 types of droppings, one type is from the intestine, and the other is from the caeca.  The former is usually brown/grey in colour with a white cap. The latter is usually pale brown and pasty. Droppings should be well formed, and your chickens vent should be clean.  Abnormal droppings can be very wet, or blood tinged, in these cases you should seek further advice from your vet.