Cat Bordhi's vid about how to do that is here (http://www.youtube.com/watch?v=LVnTda7F2V4) and very useful. Her site (http://www.catbordhi.com/) has a Moebius cat bed, but sadly no pattern.
[Edit] I don't know which style you use, but she uses continental knitting style. Using English knit stitch on the cast-ons would be just the same. :-)
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[Edit] I don't know which style you use, but she uses continental knitting style. Using English knit stitch on the cast-ons would be just the same. :-)