I have had a few poor beddy/greys recently that lacked heart and not a patch on my old 3/4whippet/beddy from the 90 s, he would take fox easily on his own,stood 21TTS,a good all round sort until he got to about 5yrs old,just wanted to kill fox and if they were not about anything would do,sheep,other dogs,in fact any stock, I had him put to sleep in the end after he became crazy,not really had one since,P,