We have 3 border collies. My male is an obediance champion. He has a get working attitude. He will wait to be told what to do and is on the more layed back side. He herds well, my females on the other hand. We they have a very high drive. One works more off of eye(tries to stare things down) the other will grip stock(bite them in the butt!) I can never let the females out with the birds. They will work the birds into exhaustion, constantly gathering them into tight bunches. That is if the birds don't try to scatter. If so the feathers start to fly. If the girls are out in the yard & the birds are in their run. Well the female BC's will go round & round the runs for hours trying to "herd" the birds. Now we have a Golden Retriever that is our Gaurdian livestock dog. He never bothers the birds at all. He has the run of the property at night. You can find him laying down with the sheep & goats or even the horses as they eat. He partols and barks at anything, especially strange dogs,which he doesn't like. Since he has been on duty we haven't had a problem with night prowlers. He has even chased off foxes during the day. He was raised with the BC's, so if a sheep is out, he runs mad dash up to them, when they turn and run, (that's a trigger for BC's to start moving the stock) he just stops and stands there, looking very confused. As a pup, he would chase them with the BC's, but on his own, with no instinct to trigger him, that is as far as he get's. Poor thing!