Actually, this is not entirely true. If you purchase eggs, the newly hatched worms will not grow on the silkworm food. You need to start the worms on a hornworm chow, then you can switch over to silkworm food after a few days.
Yep. I personally avoid silkworm chow as much as possible. I have used it a couple times, for larger worms, when I ran out of hornworm chow. My first experience purchasing hornworm eggs, I lost all 500 worms because I tried to grow them on silkworm chow.
Oooh, good to know. On the Mulberryfarm website it said it was good for both silks and horns. I'm glad you guys corrected me. I would've felt like crap if the OP lost their worms because of my post.