Can you recognize your cats from their purr? I can with my two. Dusty has a deep purr for such a little girl. Rusty's purr has a trill to it. They will come up at night for petting and I will know exactly which one is near me. And if I can't tell from the purr, I can from their tails. Dusty has a deformed tail at the base and with a little hook on the end. Rusty's tail is normal.