Tips For Choosing The Right Diner For Your Pet
A good general rule of thumb is:
Subtract approximately 4-6" from the wither height for large pets, Great
Danes etc..
Subtract approximately 3-4" from the wither height for medium pets, Labrador,
Bull Terrier, etc..
Subtract approximately 1-3" from the wither
height for "toy/teacup" breeds.

The goal is to have the food positioned at a
comfortable height,
where stooping or straining to bite or swallow is not required.