Heeeeeey...
You gotta know Job for a Cowboy are famous for thier pig squeal...
sooooo... ill teach you!!
Lets make this short, you can breath right? breath in and out.
Now, breath in but strain your vocal coards, or just make your trought really tight..
You should hear a bouncy feeling... got it???
Now you want to practice that.
When u got it down, do that but say "Bree" and there u go