If you are a dog lover, there is some good news for you. Craigslist has a dedicated category called as "pets" under the "community section". The number of uses of this category is just amazing. If you are a pet owner or if you want to buy a pet there is nothing in this section that you cannot find.
If you want to buy a pet or adopt one, there are several ads on Craigslist that you can sift through. On the other hand, if your dog has just given birth to puppies and you want to sell or put them up for adoption, once again Craigslist is your answer.
There are other pet related needs that you can fulfill as well. Say you want to buy a kennel or accessories like a collar or a leash you can either put up an ad in the wanted section or you can go through the stuff for sale under the "pets" category.
A lot of people who have lost their animals make use of these sections too. If your dog has wandered off you can put up his picture with your address and telephone number and maybe even keep a reward for the animal on the site. If your pet has passed away and you want to give his things to someone who will need them, you can put up an ad for that too. The "pets" section on Craigslist is really boon because it serves every purpose from finding things to purchase for your animal to finding a house for your dog's puppies.