if a stag or buck turns on the dog caus it knackered thats bad enough , if one turns after 50 yards cause he knows the dogs behind him then you can look out , seen both turn many a time over the years , id say the fallow is the most dangerous , he's fast agile and nasty , the red is a bit slower and i would not so nasty , I'm going by what iv seen with my own eyes , I'm talking about deer thats fresh not ones that been run into the ground by cars or dogs