So many very good questions! I'll try to answer as many as I can.

At Wolf Haven we have over 50 wolves, the majority of them are gray wolves and we have a few Red Wolves as well. Some of them are rescues taken in from a range of places while others are part of reintroduction programs taking place like the Red Wolf reintroduction program in the South Western US. Bono, the wolf in the OP(Photo by Erik Wilber), is a wolf-Dog hybrid while London (the wolf in the photo I posted) is pure Gray Wolf.

Here is a link to our list of wolves we have at our sanctuary as well as each one's individual profile and how they came to us: http://www.wolfhaven.org/our_wolves/index.php

Their temperaments, just like with humans, can very greatly with each individual wolf. Wolves themselves actually tend to shy away from people by nature. We only have about 16 wolves that can be seen on our tour while the rest are kept in other enclosures out of view of the public and away from the tour route. Aside from feeding or medical care, some of the wolves do not interact with humans at all. This is because many of the wolves have such different degrees of human interaction. Some, however, are quite sociable and tolerate humans fairly well.

Here is a more in depth FAQ we offer regarding the care of the wolves at Wolf Haven, for any who may be interested: http://www.wolfhaven.org/FAQs.php

Many of the wolves we have at our facility come from road side attractions, zoos or from private owners who thought that owning a wolf or wolf-dog would be similar to owning a domestic dog breed. While some of these wolf-dogs can be very people friendly, others may retain more of their wolf traits and what you could end up with is a Wolf that has lost it's fear of people. A strong and determined animal can have devastating and potentially unforeseen side effects.

Wolves also have an instinct to dig--DEEP holes. We have been contacted by parties who have discovered too late that their puppy has now grown into a very large and demanding adult they no longer are able to care for. They are also very intelligent and excellent escape artists so many people simply do not have the proper facilities to accommodate these animals.

Nearly all of our wolves, aside from any that are on loan for special reintroduction programs, live out the rest of their lives at Wolf Haven. Those in Reintroduction programs are treated as wild and not given the same enrichment as some of the other wolves, as not to promote or foster any instances predator/human conflict when they are released back into the wild.

Wolves can have some pretty awesome and unique personalities. The bottom line, however, because of the unpredictable nature of the animals, they are not great pets. The major difference between owning a wolf and today's domestic dogs are defined by the centuries of breeding for favorable traits in the dog that has essentially changed the animal almost entirely.

For anyone interested in knowing more about how the evolution of wolves into the domestic dog was possible, I'd recommend looking into the study done by Russian scientist Dmitri Belyaev on the domestication of the Silver Fox. What they discovered is that over time, by selecting certain foxes based on behavior and temperament they not only changed the behavior of the fox, but their appearance began to change as well. Not only that but the chirp sounds commonly associated with the wild fox began to adopt more dog-like characteristics. At the same time they bred foxes with the undesirable traits and found that those foxes didn't change physically, but they did lose their fear of humans.

Sorry for the long winded answer, but I hope that may have helped answer some questions. :)