I have the Lil Dog. It works really well. Easy to blow and can be used with or without the horn. Makes good howls and other distress sounds.
I also have other calls from some of the makers on this forum and they are also great calls too. ( Tony Tebbe, Dan Thompson, Haydel, Rhino, Burnham Bros Mini Blaster and others)
I use all of them just to change up the sounds at different times.