This is where people make the biggest mistakes with a pup,especially Deerhound types,it kills a couple of easy rabbits and so it will soon be ready to test more fully,then reality kicks in and a pup that would have been better left until it was both physically and mentally prepared,as been overfaced,overmatched and if not ruined will take longer to reach its potential.
At what age do you say I don't think this dog is what I want or up to its job 2, 3,4 year old?
Lets be honest there's better dogs on rabbits and hares even though deerhound lurchers aren't the worse at hare coursing.
Iv s