For frozen bloodworms (way more protein and easier to feed, IMO), a tiny chunk will do - and maybe four or five bloodworms, but it depends on your fishie's appetite. Just remember that they are not an everyday food. At most, you'll want to feed three times a week.
Freeze dried are less nutritious than frozen, so I don't feed them to my bettas. If you do use freeze dried it's recommended that you soak them for awhile to let them swell. Unsoaked they can bloat your betta's belly and cause constipation.
You might want to use tweezers as touching them can cause an allergic reaction. Other than that, bloodworms are awesome, lol. My bettas go absolutely nuts for them, and I hope yours do too.
Last edited by fleetfish; 07-02-2013 at 09:40 AM.