By OCD, I assume you mean Obsessive / Compulsive Disorder. My Chocolate Lab, Cocoa, was obsessed with food. She did not want the other dogs to be near her food dish, she didn't even want them to look at her while she was eating. She was so obsessed that she would haul her food dish into her dog house when she slept or drag it around the yard with her, so no one else could get any of her precious dog food.
She also had a thing for bread. Occassionaly I give the dogs some bread, I'm not a big bread eater and it goes bad long before I am 1/4 way through a bag. So, once it gets hard, I throw it out for the birds or the dogs.
Well Cocoa would collect all the bread that she could find and stack it up near her. One piece on top of the other. Not sure what she was trying to accomplish, but the bigger the pile, the happier she was. Again, the other dogs were not allowed to eat "her" personal collection of bread, nor even look at it.
Sometimes I would throw dinner rolls out just to watch her try to stack them up. She'd amuse herself for hours, trying to get the rolls to stack up like the slices of bread. Of course, they are rounded and she couldn't get more than a few stacked up on top of each other before the entire stack would tip. Then she would start all over.
Cocoa was a very entertaining dog, not sure why she was so obsessed with her food, she was never starved or had never had her food with held for any reason.