I am considering in buying a givenchy rottweiler sweater from ebay, but my untrained eye can't see if it's authentic or not! I would love some opinions.   Is any of these sweaters authentic?   http://www.ebay.com/itm/160956882639?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648   http://www.ebay.com/itm/330863063161?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648   http://www.ebay.com/itm/251215414700?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648