Translation:Can dogs dream?
Can this translate to both "Can dogs dream?" and "Will the dog dream"?
You can imagine a small child asking this about their new puppy that's just fallen asleep.
Yes. This sentence is asking whether (some) dogs have the (uncontrollable) ability to dream or the possibility of dreaming.
I've watched my dog dream before. Cracked me up. He was whimpering, pawing at the floor, then woke himself up with a sudden bark.