Lucky Bird from FoxPro does well for bobcats. Higher pitched distress sounds like bird distress (woodpecker distress), vole squeaks, rodent distress, etc are the ticket for calling kitties...

In general, most guys will say, for cats, just let the caller run continuously. Decoys are a great tool. I seem to do better getting cats to come to the decoy with intermittent motion decoys, seems to pique their interest more.

Decoys don't have to look anything specifically, except something edible in distress. A feather on a string is fine. A decoy topper with white, black or brown, and red do well.

A FoxPro caller with the corresponding FoxJack decoy are fantastic cat calling tools.