got a kelpie here with a little bit of sheepdog in the mix, shes 16 months now, trained her up on the sheep but recently been taking her out bushing after rabbits, keen and will fly through the middle of bramble patches, good nose, just gets a little bit mad on scent when hunting needs to steady up a bit. Shes about 20" to the shoulder and light framed and shes come close a few times on rough rushy ground but nowhere near on open. Easy to train as well