I hate to tell you this but one of mine has beautiful thick true silky hair.  But his behind is curly.  He's now 5 years old!!  Still curly!  It does do better longer not quite so much curl, but it is still there!  I tried cutting hiim down to a shorter cut last Christmas.  Wow! It curled even more!!  I hope yours does grow out of it, but I wouldn't count on it.     
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