You can get free dog crochet patterns online through crochetpatterncentral.com as well as other online resources. The dog patterns that are available on the Crochet Pattern Central website include a puppy princess, a back-to-school dog, Cuddles the Puppy and a granny dog pattern.
This website also offers free crochet patterns for dogs including dog collar patterns, dog bed patterns and dog sweater patterns. Some of the patterns on this website are available in PDF format.
One other online resource for free dog crochet patterns is the popular social network site Pinterest. The patterns that are posted on Pinterest.com include dogs in different colors and costumes that resemble real dog breeds.