Several people have been doing some digging into the history of the ultra line, and it turns out that the ultra line of corns are probably grey rat hybrids... Rather than repost the entire info here, email me and I'll send you to the site it's on (KS won't allow links to be posted to there...). Or, if you know where to find the 'other' forums, check under the 'Ultra Mystery' thread, starting on page 26, 3 posts from the bottom...

-Kat
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"You keep WHAT in your freezer?"
"Mice. And rats. If that bothers you, I can call them 'cows' instead."

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• Looks like Ultra may be a grey-rat hybrid morph... - Kat, Sat Oct 9 15:00:08 2004
• RE:::.....10 minutes after I got a pair..... - jyohe, Sat Oct 9 19:38:12 2004
• Verrrryyyyy interestink! (throw back humor for those who recall Laugh-In!) - Darin Chappell, Wed Oct 13 15:42:45 2004