Those may not be Dogs; Those could be "Guardian Lions". Notice that their tails end with a bushy brushes. Dog tails have plain ends.

They are Burmese Chinthes not dogs. "Foo Dog" is a colloquialism and misnomer, but most westerners recognize the term. I was speaking with an auction house rep and said Burmese Chinthe and I got a "huh?" When I said "Foo Dog," instant recognition so this permeates the vernacular even among pros. I believe that an older Chinese word for lion led to the "Foo" part. The Chinese guardian lion humanized facial characteristics are easily mistaken for those of a dog, rather than a lion.

Chinese guardian lions are traditionally represented in a pair where the male has his paw on a ball of string and the female has her paw on a kitten. This mythology evolved differently in S.E. Asia, specifically Burma, Laos and Cambodia where the lions took on a half dragon look. You can also find Chinthe images with human heads, so the humanization is a common thread.

P.S. If you look at the Japanese versions (komainu or shisa) you will see the origins of Japanese animation design sensibilities. To me, they are the most whimsical.

Possibly brought back by a Viet Nam era serviceman?

Entirely possible