Yeah sorry I made the tutorial and my Gimp is German.
Basically, make a selection INSIDE the object (i.e. animal etc.), then delete everything outside that selection. This will give you a rough shape but without any furry effect. Don't forget to click on "Select > Select All" after this to get rid of the selection after you deleted the background and to rightclick the layer and choose "Add Alpha Channel" to make your layer capable of displaying transparency.
Then, take the Smudge-Tool (the finger symbol in your toolbox) and go to the tool options (If you can't find it, you can always open it up by clicking "Windows > Dockable Dialogs > Tool Options"). Once you're there, select a brush size that is equal to the size of the hair you want to create. Also choose a rate (= how strong the smudging effect is = how long the hairs become) that matches the hair's length. You can enable the "Fade out" option as well to emphasize the effect of the hairs getting thinner in the end.
Now comes the active part: With the smudge tool enabled, click inside your image, close to the border, and hold the left mouse button down while dragging the cursor outside the head/body. This should give you a line that looks similar to a hair. If it is too big/small/short/long, you have to adjust the settings of the smudge tool.
The brush size and smudge rate settings as well as the fade out options are dependant on your image, so I cannot tell you the values you have to choose. Just play around with the sliders until you think it matches your hair/fur style.
And if you're still struggling, here's a picture that explains everything Click on it for a larger view!
Hope this helps
You do not have the required permissions to view the files attached to this post.