Yes - it would be difficult for an unborn calf (Slunk) hide to get a barbed wire wound.
Jeff at SternTanning thinks they just missed a bad spot and it opened up when handling and/or drying.
Ha ha. Barbed wire is unlikely if it really is slunk. from http://en.wiktionary.org/wiki/slunkInterestingly, I note that it is increasingly difficult to find this definition of slunk on the web dictionaries. Now it is just the past participle of slink in some online dictionaries. Young people today... FYI