Why Do Dogs Hide. And like with most behaviors, it all comes down to your dog’s natural instincts which go all the way back to its ancestors. Just like humans, dogs can fixate on things, and if there are too many toys around it can lead to overstimulation and obsession.

Dogs hide for many different reasons, the most common being that they want to feel safe. To best work out why your dog is hiding or behaving irregularly, you will need to look at the overall context of their behavior. The more common school of thought is that dogs are hiding instinctively to protect themselves, and the other theory is that dogs do not hide, rather they walk off somewhere and are too sick to return.
