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Here are two guinea pig charts that can be used for cross stitch or crochet.
This chart can be worked as a cross stitch pattern or crocheted as an afghan in single crochet.
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Colors of floss for cross stitch
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Colors of yarn for a crocheted afghan
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Use this chart to work sideways in half double crochet (hdc)
For more information on this pattern, go here:
http://www.examiner.com/article/the-guinea-pig-love-it-eat-it-or-crochet-it-into-an-afghan-with-free-chart-1