Generally agreeing, but as a Corgi owner just a small correction: They are short in height but have a long body. It's not a problem if the breed is small, the proportions have to be right.

Corgis, although at the border to a problematic ratio, the breed lines I'm accustomed with are still fine(Europe). Corgis tend to have back problems when not properly prevented their whole life - avoiding downward stairs, restricting jumping or anything in the direction of dog sports made for Aussies, etc. But due to their stockier build they are pretty robust against the typical problems you see in Dachshunds for example. It also helps that they're not hopelessly mis-bred yet