--Why did the owners give him up? Did the family give any information about the dog? It will be helpful for you to find out everything you can about the dogs past so you can train him well.
--What is the age of the dog (it can be approximate)? If it is a rescue dog, he can range anywhere from 8 weeks to 15 years.
--How long has this dog been in the shelter or foster care? If he has been in the shelter for a long time, he may have some kennel-related behavior issues, and may have a need for remedial housetraining. If the dog has been with a foster family for awhile, the family may give you valuable information about him.
--Upon arrival, has he had any medical or behavioral problems? They may or may not be serious.
--What kind of medical treatment has the dog had? See if there are any treatments that need to continue or if there is any long term effect.
--While in the foster home or shelter, has the dog been getting any training or socialization? Does the training need to keep going?
--Are there any training or behavior issues that need to be addressed, such as housetraining or dog aggression? Make sure you can handle these issues.
--What is the activity level of this dog? What are the exercise needs? Choose a dog who has the activity level that is the same as yours.
--Will this dog be compatible with my lifestyle? A shelter or a rescue should be able to help you find a perfect dog for your lifestyle.
--Does the dog have any signs of aggression with people or animals? If the dog has aggressive behavior, he will need extra training. Dont choose this dog if you have no idea how to train an aggressive dog.
--Does the dog prefer a certain type of people—men, women, kids, or the elderly? Try for a good match, even though dogs are adaptable.
--Does the dog need to have another dog in the house? When you are adopting, dont forget about your existing pets.
--What is the return policy of this rescue group or shelter? Will they take the dog back if the new home doesnt work out for him or he has a major medical problem? If the dog has major medical or behavior problems, a good shelter or rescue group will usually accommodate a return.
--Has the dog been altered and has he got his first vaccines and worming? Usually this will be done. However, the majority of the municipal shelters will do just the bare minimum.