Mine are out probably 70% of the time. If they're not out, as soon as food hits the tank they are.
I used to have a shrimp (RIP Kobayashi!) until my flower nem ate him, and he would steal from anything with food (which is how he ended up a meal himself). I would lure him away and squirt some food in a spot or give him a small piece of silverside to distract him when I would feed the suns.
The shrimp was a cool addition to the tank, but such a PITA that I don't think I'm going to add another.