I know my instructions gave keywords to use for the different types of noises you were going to immitate.

Cluck - say, "Plock"
Yelp - say, "Chaulk, chaulk, chaulk"
Cutting - say, "pot, pot, pot"
Purr - vibrate your vocal cords similar to gargling, vibrate your lips or flutter your tongue
Cackling - say, "kit kit, cat cat cat cat, chaulk chaulk chaulk"
Kee kee - say "pee pee pee"
Kee kee run - say, "pee pee, chaulk"

One thing to make sure of is that your call actually fits your mouth. I have bought four mouth calls and only one fits really good.