I take my pup out about once a month to have a watch of the older dog run only a walk out local.As said above could cause problems on the lead but won't do any harm if not over done.Putting more time into his training but has the odd day through the week ferreting keep him keen and watching.But everyone to there own everyone will have there preferred way of training its down to you.
My pup won't see a run till over a year old made the mistake of running a dog to early before but got him right back on track now.
Roll on next season.
Atb shaun