English Springer Spaniels
They are said to rarely be affected by hereditary diseases. When health issues do arise, they are usually eye related.
These are small fox-looking pups, but they are tough! They are known for being very healthy dogs.
Poodles, both small and big, have a good track record of remaining healthy dogs during the duration of their lives.
They are obviously strong dogs as their running ability demonstrates, and they are also very healthy as any big health issues in the Greyhound breed are indeed rare.
They are great working dogs and they tend not to have the common problems that other popular breeds have.
They do have allergies, but they also rank as one of the healthiest small dog breeds overall.
These guys have a record of amazing health. They are bred mainly for performance and are a very versatile working dog, but they do not have many of the common health problems that other working dogs have.
Many of the common health issues dogs have, Beagles seem to not get. All breeds have their issues, but the Beagle is an all around, generally healthy dog.
Basenjis are adventurous dogs, and while one of their breed characteristics is that they dont bark, another is that they dont have many if any health ailmens.
Australian Cattle Dogs
These have the record for being the longest living dogs as one named Bluey lived for 29-years-old! They also have a good track record for having few health problems.