The poodle-Shih Tzu mix has an "eerily humanoid" face, says the Indiana animal welfare agency.
The candid photo of the pooch was taken by Renny Mills, a professional pet photographer and posted on Petfinder.com.
The photo went viral Wednesday.
Petfinder wrote that Tonik isn't suitable for a home with children as the dog might be overwhelmed.
The fee to adopt this unusual pooch is $250 and hopefully Tonik's newly found fame will help find him a home.