I am late in posting this, but i've used PEK for our blackies beards about 4-5 mths now. I dilute it slightly so it is more of a thick paste. Then I put it on the "nasties" ie heavy mats, which they get under the chin, near their jaws, under the ears etc. I let it sit, then sit some more, if it is bath day, I will take them into bath and wash body, legs, then wet face, beard, and use a special comb, and a special dematter, (which is often not necessary), the mat breaks apart really easily and in the tender areas of face/jar, it is a very good product to use.
Jenn this is a heavily coated double breed, so you can imagine the mats these dogs can get, Yorkie mats just do not compare!.
So while I bought it for Razz our Yorkie, I use it
all the time for the blackies, and have had to use it only once for Razzman.
