I own one ,and it is one awesome dog it was bred by Turk.I prefer the heavier types to work with my terriers,but thats what I like.The other heavy types I have are 5/8,3/8 x1/2 bullgrey,plus a wheaten x 5/8,3/8 bullgrey.If you just do terrier work I find all the heavy bull types work well,but thats just my opinion.