Yup, I got her really young. Not labeled a "baby" betta because Petsmart doesn't sell those, but still really tiny and fragile. Then I fattened her up with lots of frozen bloodworms, brine shrimp, and added garlic and vitamins. She is now my biggest fish, significantly dwarfing my male.
You can't see it in this picture, but if I look closely at her mouth I can see her teeth. Freaks me right out! lol.
Remember that the tank your fish lives in is his or her's whole world. Ask yourself this question, and answer it honestly: would you choose to live there?