I never do a constant pup cry/distress. I'll start out with a low squeal (vole, mouse, rat, bulb squeaker) then switch to whatever distress call I'm going to use, jack, cottontail, fawn, etc. I let it run loud and constant for about 5 to 10 minutes at the most, then switch to pup in distress for a few minutes. Once I sit down and turn on the caller I never turn it off until I'm ready to move on. However once I turn it off I do scan the area before I get up. Plus I always carry my rifle with me when I walk out to the caller, have killed more than one coyote while walking out to pick up the caller.