Personally I use rescues that foster out the pets. The dogs are not in cages in a crowded facility. This means they are more likely to be healthier & have less anxiety issues. Also I am guessing in crowded caged facilities they may have more exposure to ill dogs & might receive more immunizations. What is nice is the foster parent can report how the dog interacts with their family & other animals, what they observe that might require attention, what the dog enjoys like car rides, cuddling & so forth. Also they reveal if the dog has any health issues or had any in the past & they provide medical care to the dogs. They do know most of the rescues past immunizations, unless the dog came as a stray. It is likely most have had initial vaccines, but as new owners we don't have to continue them. The dog pictured had little training when we adapted him, but since I love training dogs it turned out to be a great experience. (He was tied out most of his first year). 😇