I like to use higher pitched sounds, like young cotton tail rabbits some of the bird sounds and mice or rodent squeaks, even during breeding season. You can do the cat sounds and see what happens it's just a matter of timing and being where they are and seeing them move or noticing their face staring at you with their tail moving side to side, they are a lot like a house cat and don't seem to keep their tail from moving. If you have any birds of prey crows, magpies, or scavenger birds, ect. showing up and making a fuss when you are calling you are doing what they want to hear, and they will eventually show themselves. Years ago, Johnny Stewart had a yellow flicker that he used for grey fox that was killer on cats here as well as red fox. I have noticed that the sounds used for the fox seemed to do better for cats. I have noticed that often the birds will tell you where the cat is setting and watching you even the songbirds tattle on them. When I notice a gathering of birds, I start observing that area if I get a coyote that is cautious and looking a certain direction it might be looking at a cat or another coyote, they tell on each other. With cats it's often very subtle hints that give their presence away. I would nearly place money on that you have called them in and just not seen them yet, it's a blast when you figure out that they are coming to your efforts, and you just haven't seen them yet. Call for up to an hour, wait for maybe 15 minutes then just walk a circle around your stand, out maybe 50 yards if you have any snow. You may find a story out there waiting to tell you about some things for the next stand.