My pup Belle has dreams nearly every time she’s in a deep sleep. But that’s nothing unusual for a pup or maybe even any dog. I’d love to know if any other pups sound like they are suckling? Belle would usually move her mouth and a clicking sound would come from her, kind of like swallowing. Personally, I think it’s really cute when she’s dreaming and I’m not worried at all. I’m just curious to see if other puppies do this, as I can’t remember if my other dogs done this at her age.