Silkworm pets

I was talking to a friend recently who told me she used to keep silk worms as pets. Yes, the little critters who spin silk out of their bums so we can make gorgeous material that shine and shimmer and cost a bomb. I was wondering how she ever got hold of enough mulberry leaves to feed them, unless she had Mulberry trees in her backyard! The question was answered in the next breath. She ran out of food and the critters died - poor things! Before they ever got to spin any silk cocoons too! So the moral of the story is to ensure you have lots of exotic food on hand if you want to keep exotic pets!