Hi, not a question as such but perhaps help with an answer. The small skull found in the owl pellet in Texas. It is unquestionably a weasel skull, most likely a female and probably a fairly young one at that. It will have 34 teeth as all three likely species in North America do, but it is most probably a Long tailed weasel, Mustela frenata as the other two species (Least weasel and short tailed weasel) aren't found this far south according to Burt & Grossenheider's Field guide to the mammals. I hope this is of use. (a measurement scale would have been useful)

most helpful thanks - I have linked this to the previous question.