Hi Marie,
We avoid dog foods with a fat-to-protein ratio (FPR) exceeding 75%. Please keep in mind that unless you’re feeding a high activity animal (like a sled racing dog), a food with a lower FPR (say 65% or less) provides better nutritional value.
Regarding Westie pups, I know of no special nutritional standards published in a peer-reviewed journal unique to that particular breed.
Since you’re feeding a Type 1 dog (a small breed puppy) and depending on your own dog’s biology, any food on our Type 1 list should make an excellent candidate.
Hope this helps.