I don't agree with keeping wolves as pets, or hybridizing wolves. Millions of fine dogs are killed every year in US shelters. Animals we troubled to domesticate. If you've done your research, taking in a rescue wolfdog, over a puppy from a breeder, would be another issue entirely.
Aside from this, there are a lot of people who mistake percentages. Such as the dog in the photo above. Here is a comparison photo, linked to show a dog that actually is 50% wolf:
http://www.wolfpark.org/wolfdogs/figures/figure016.JPG
I highly doubt the canine in "TheMoonlite's" post contains any amount of wolf blood whatsoever.
Here is an excellent article on the subject of distinguishing wolves from dogs, and percentages:
http://www.wolfpark.org/wolfdogs/Poster_section1.html
This may also prove useful, if a bit long - hopefully forgiven:
Wolf
Feet and toes.
Hair will protrude between the pads of the foot. Usually a reddish color.
Lots of space between pads on feet. Pads are not rounded.
Toes point outward and are elongated.
Rear legs are cow hocked.
Toenails and pads are always black.
No dewclaw in the rear.
Teeth.
Large Canines and premolars
Premolars are well-formed, no spacing.
Dark pigmentation at gum line near the teeth. No spots on gums
Tail.
Tail is “brush tail”
Tail does not curl up
Has black patch at precaudal gland (a few inches down from the base). Also black tip at end of the tail.
Reproductive system.
Wolves only breed once a year starting in late January to Mid March.
Wolves do not come into their first heat until two years of age (generally)
Head and ears.
Eyes are angled and yellow (generally)
Lack of furrow between eyes
Gentle slope without protruding brow, domed forehead or pronounced stop.
Muzzle is long, not heavy or broad
Head in not boxy like domestic dogs
Medium size erect ears
Inside ears are heavily furred
Nose is always black, never pink.
Wolf-hybrid
Feet and toes.
No hair protruding between pads.
Pads are very close and rounded
Toes point forward
Legs are straight and point forward
Toenails are marked with pink or white
Dewclaw in the rear
Teeth.
Smaller canines and premolars
Wide spacing between premolars
No dark pigmentation at gumline near teeth. Spots on gums.
Tail.
Tail is "flagged"
Tail curls upward over back
No black patch at precaudal gland or tip of tail
Reproductive system.
Signs of breeding other than January to March.
First heat cycle before two years of age
Head and ears.
Eyes are round, different color eyes, not yellow
Furrow between eyes
Domed head, protruding brow, domed forehead, and pronounced stop. Boxy head
Short muzzle, broad, or heavy
Large or floppy ears
Little or no fur inside ears
Nose has pink