The majority of canines may struggle to adapt to life at a shelter. Like this 10-year-old golden retriever mix puppy that was raised in a caring environment. Rio appeared to be giving up as he shut himself off from everything within the shelter and refused to budge from the wall.

The staff members of the shelter quickly realized that Rio's situation was abnormal. Since being brought to the Detroit municipal shelter, the dog has refused to eat, has reacted negatively to even the faintest human contact, and—worse—has what's refused to leave the wall.