Dogs are inquisitive and exploratory animals.
If somehow your “best friend” goes missing start by trying to determine where the dog was last seen.
Talk to anyone in the area. Talk to other dog owners. Knock on your neighbours doors. Remember dogs are pack animals and it is very common for loose dogs (please note shy or feral dogs may not follow these standard behaviors) to approach people or other dogs. Dogs attract dogs.

My border collie would regularly decide to go on an adventure and take off through the neighbourhood. One of my standard procedures was to get in my car and drive around calling her name. We always found her. Sometimes she saw us and would still run in another direction – then it became a challenge of wits. Listen to dogs barking – a dead giveaway something is happening near there.
Look in areas where the dog could have gotten trapped. Look under, over, and at eye level.
Dogs that appear to be friendly or valuable are picked up by people more often than aggressive or sickly dogs.02dog_forweb

Call your local SPCA, dog pound, shelter to see if a dog matching your description has been turned in. As investigators we know how often people misinterpret descriptions so are strong believers in sending your poster by fax or email to these organizations.

If however you dog is missing longer than normal put those posters up right away. There is nothing special about a poster – it is informative, has a picture, and a phone number you can be reached at. Put them around your neighbourhood immediately. You do not need to spend a lot of money on your poster – just get it out and about. There is a sample form attached  – Pet Detective Flyer . Please note for animals missing longer than two days different search methods are used.