The farm animal program

1. Make an animal interface. It calls for an animal to eat (String parameter, returns boolean), to make a noise (no parameter, returns a String).
2. Create a cat class that implements the animal interface. It can eat "cat food" and it says "meow".
3. Create a horse class that implements the animal interface. It can eat "grain" and it says "neigh".
4. Create a cow class that implements the animal interface. It can eat "hay" and "straw" and it says "moo".
5. Create a bird class that implements the animal interface. Birds "chirp" and eat "worms" and "insects" and "seeds". Birds also lay eggs (returns a number, no parameter).
6. Create a chicken class that implements the bird class. Chickens do not "chirp", they "cluck". Everything else is the same as the bird class.
7. Create a runner class that tests all of this by making a cat, tiger, cow, bird and crow. Test their methods.