The Furminator is the ONLY brush/comb (and I've tried them all) that actually makes Jack the Cattle Dog shine. He sheds copious amounts of hair every day - and worse in the spring and fall - so it's not unusual for me to Furminate him daily. DO NOT Furminate in an RV Park unless you want irate neighbors.... but on the good side, I've seen birds' nest that have fallen from our pine tree, and they're carefully lines with nice soft dog fur.....
I tried using it on Ike, my late Aussie - and it didn't reach down and pull out the dead fur on his long, silky coat. I had better luck with a long-toothed comb on him. And it doesn't do squat on the poodle-mixes... but they don't shed.