Zoo Tycoon: Dinosaur Digs [cheats]

More money:
Press [Shift] + 4 to get more money.

Change pointer hand color:
Press [Ctrl] + C.

Secret Unicorn
When selecting exhibit name type Xanadu in its place. Unicorn will then appear in animal menu.

Deinosuchus:
Complete all the scenarios and when the last one is done, click "No" to go to the scenario selection screen. You will get a message about that scenario and be told that the Deinosuchus (giant salt water crocodile) has been unlocked to use anywhere.

Easy Best Exhibit Design award:
When you make an exhibit, place three large rocks (which satisfy most animals, but not all --the warthog which is happier with more) and put all the foliage in one corner and a few others scattered through the exhibit but quite a bit apart. If you clump it all in one corner, once the animals are in the green bar with happiness, with thier foliage stop. Doing this with two or three exhibits will easily win you the award.

Easy fence repair:
Instead of waiting for a maintenance worker, just buy the same kind of fence and replace the deteriorating part. If you are low on money, pick up the worker and move him to the fence. However, there is no guarantee he will work on it -- they will just walk away.