Wildlife and domestic pets are not the same. Wildlife responds differently to human intervention and unwanted touching. They are not domesticated. They abide by the rules of the wild. As such, there are laws that criminalize such interference whether it be a hummingbird (The Migratory Bird Treaty Act of 1918), seals on the beach (The Marine Mammal Act) or United States Fish and Wildlife Rules regarding bison, In other words, the danger to humans notwithstanding, these laws are designed to allow our wildlife to behave naturally, in the wild.
Unfortunately, whether you mean well but are simply ignorant of the issues, determined to torment an animal in order to take a selfie, or just have an irresistible impulse to touch and get a closer look, the result is the same. The animal always suffers harm.
President Obama just declared the bison the Official Mammal of the United States. It is worth it to mention here that in the 1500's an estimated 30-60 million bison lived here. Now, there are about 500,000.
Today, there is 1 less.