These popular small dog breeds include playful Jack Russel Terriers, cuddly Pomeranians, energetic (and hypoallergenic!) Yorkshire Terriers, lovable Maltese and even some toy dogs, who are very miniature in nature. If you're ready to welcome a new pup to your family - or you just need a serotonin pick-me-up - scroll through our list of the top small dog breeds that are adorable as they are sweet. For instance, if you have a small space, limited mobility or little kids, a small dog breed might be just the right forever addition to your home. But not every size dog is an ideal fit for every pet parent large dog breeds and medium dog breeds can be a mismatch for certain homes. As any real dog lover knows, every canine is simply perfect just as it is - no matter what size his boopable snoot.