In this instructable, I'll show you how to make a simple rope dog toy using two Matthew Walker knots. Many rope toys you can get at the pet store consist of a rope with two overhand knots in it. The Matthew Walker knot is much more symmetrical and less likely to come untied. With three strand rope, the Matthew Walker knot makes a great stopper knot which prevents the rope from unraveling. I'll be using this knot in other dog toy instructables, so follow me to see more!
Step 1: Get some rope
I always use cotton rope for my dog toys. It's all natural and isn't a big deal if your dog swallows pieces of it. I get my rope from both Knot and Rope Supply and Amazon. Knot and Rope Supply sells cotton rope by the foot in a number of different sizes: http://knotandrope.com/store/pc/viewCategories.asp?idCategory=6
I also have ordered spools of rope from Koch on Amazon: http://amzn.to/15MFPY3
You'll want to get the right size rope for your dog. A 1/2"-3/4" rope would be suitable for a little dog, while 1.5" rope works for very large dogs.
Step 2: Preparing your rope
I'll be demonstrating with 3/4" rope. Begin to unravel the three strands of your rope. Now tape the ends to prevent each strand from fraying. Taping the ends isn't absolutely necessary, but I recommend doing it if this is your first time tying a Matthew Walker knot. Once you get the hang of it, you'll be able to tie the knot before fraying becomes too much of an issue. Now unravel about 8"-9" of rope. With bigger diameter ropes, you'll need to unravel more to be able to tie the knot, while smaller diameter ropes will take less.