First of all, welcome to the board!
If you want a good howler, get one that is an open reed type. These will give you more variety in your sounds. I dont have one of his calls, but from what ive read, Rich Cronk is the man for a howler. I suggest contacting him for a quality custom howler. However, you DO NOT have to have custom calls. Quality factory howlers are the Hunter's Specialties Song Dog, The Primos Randy Anderson howlers, dan thomson red desert howler, etc.
I've never hear dingo sounds. But if they sound similar to wolves then they have a deeper sound than a coyote. a coyote's howl is higher pitched. They have various howls of different tones and pitches. Most older dogs have deeper voices and the younger ones and females, a higher pitch.
As far as the distress goes, you cant go wrong with johnny stewart calls, primos, crittr call, or any call from a quality custom call maker. The Johnny Stewart pc-7 has a great higher piched raspy sound. I love it. Closed reed calls are easier to learn than open reeds. However, open reeds aren't that hard to learn. With closed reed calls you get pretty much one sound. With open reeds you can get many sounds from one call. Howls, rabbit distress, various squalls and screams, high pitch, low pitch, clear, raspy.........and the list goes on. But I for one think that closed reed calls sound more realistic for rabbit distresses.
I suggest that you purchase a good calling video and a rabbit distress audio tape or two and a howling audio tape or two so you can get the idea of how you should sound when you are calling. You can also go to www.westernrivers.com and download different sounds. Im not shure, but my guess is that the dingos and wild dogs can be hunted in the same manner as coyotes??????
Todd
