I learned this from a pro here and it's worked for me...
I used albendazole (brand name Valbazen). You will find it in at the farmer's co-op, farm supply store, etc.
You give 1/2 cc orally, undiluted, per standard bird. Bantams get 1/4 cc.
I bought mine online from Jeffers and I still have the unused stuff in the fridge that I'll use again come March or April when it starts to warm up.
i used pumpkin seeds on halloween. also fed them the flesh.
im sure you can buy the seeds and would probably be much cheaper than buying worming tablets. plus is organic