I don't know of one already made up, but possibly you could take a dog motif and incorporate it into your own blanket. There is one for this sweater done in stockinette stitch you could practice with and see if it works
http://www.lionbrand.com/patterns/70554AD.html

Don't know if you can use the same motif for crochet or not.

Thank you. I have some graphs that a friend suggested but I might be able to use the bears and start from there.I'm in the planning stages right now because the MM kit seems too blue for a little girl.

Well I am still trying to make these bears look like dogs. I've tried changing the ears but it's just not right. I even added some fun fur but nope. Anyone have any suggestions?

This Puppy Love Afghan from Annie's Attic looks easy enough to create without a pattern.

Here is a link that might be useful: Puppy Love Afghan

You should probably try one of the dog graphs you have or find a picture you like and then convert it to a graph using this link - works great

you could also search for graph patterns of Snoopy

Here is a link that might be useful: KnitPro