Hornworms grow extremely quick. It's the only thing I buy from the chain pet store. If you only have 1 cham, I would buy the 4 pack from the pet store. After 2 weeks the hornworms might be too big for your Cham or they will have eaten all of their food and die from starvation. If you order online, make sure to buy extra food. Hornworns and silkworms are non-stop eaters!
WARNING - Breeding hornworms can be detrimental to your health!
1. The cocoon moves
2. Hawk Moths are large and ugly
3. They spew a nasty liquid
4. If you abandon your breeding project, you will likely try to release the Hawk Moth in the wild. Well he likes the home you've given, he will refuse to fly away.
5. You will then retrieve a stick, hit the cage and run for cover simultaneously, to encourage the Hawk Moth to leave. Guess what - he's still there. Now you are stuck with a Hawk Moth the size of a silver dollar.
Sorry for the rant. A memory was triggered.