what is staying in jail over night for fighting like?
Do you mean the WOODEN castles or the STONE castles? The answer of how to make them would depend on which material you want to know about.
Special Teacher and AC are correct, alligators were never put in castle moats, as neither alligators nor crocodiles are native to BritainThe moats would have been stagnant pools of water, smelly and unpleasant as the latrines emptied into them