Obviously healthy.
wise horse
A horse that requires little extra dietary maintenance and maintains a healthy weight is called an easy keeper.
A horse like that would be called a hard keeper.
The word would be "sound".
It would just be his ideal weight. A horse that keeps a good body weight with little food is called an 'easy keeper'.
Moderate butter consumption is perfectly healthy.
An easy keeper
an easy keeper
NO! She is perfectly healthy, she would be in the hospital, but she is totally healthy.
This type of horse is refered to as an "easy keeper".
Horses are notoriously robust animals, hence the expression "healthy as a horse".