Two words: Cow Palace.
OK, maybe you need some more words. How about AKC Dog Agility Trials, bird demos, a cat show(!) and a rainforest experience? Better? Good.
The World of Pets Expo comes to the Maryland State Fairgrounds (2200 York Road, Timonium, Md., about 50 miles north of D.C.), Friday through Sunday, Jan. 27-29. See the complete schedule of events here. Admission is $10 for adults and $5 for kids (you can buy tix online).
You can check out amazing animal tricks, see "Tie Wiazard of Oz" re-created with an all-canine cast, learn animal health tips, or even learn how to raise chickens, if you're into that sort of thing.
Plus, three more words: Parrot Behavior Workshop.