Is your dog miserable?
A dog crying in his sleep does not necessarily mean he’s miserable. Their whimpering is akin to our somniloquy or sleep talking where we say things we’re unaware of.
What dogs dream about
According to puppy behaviorist Stanley Coren, dogs dream about day to day activities such as play and exercise. They normally dream about events that happened earlier in the day or not too long ago, and it plays a critical role in encoding memories. However, unlike humans, a dog’s dream is driven mostly by smell.