Rather than start a new topic that offers little or no information for us to go off from, please consider using the search button in the upper right hand corner of every page at Zoo Admin. There are countless threads devoted to helping you with each scenario and challenge in the game.
Also, if you are going to start a new topic, please remember that you must give us more information than "i need help". What aspect are you having difficulties with? We could be here all day trying to guess what exactly you need help with. That's the equivalent of setting a math book in front of us, saying "i need help" and not even giving us a general idea of what chapter you are working on.