Hi hedgesteeper, i dont class myself as a deer expert, but scooby has bagged over 20 CWD and i have yet to see any acting aggressively....they do not want to attack a dog....ever.... however, muntys can sometimes geta little frisky, my dog has been spiked twice this year, once badley and the other just a skin tear.....i think you must try and start your lurcher on any deer really..as long as the dog is big enough and mature enough, but, i would leave the fallow and sika alone until they have knocked over a few roe as i beleive taking big deer with your dog will cause it to alter its style on