I don't know much about Merrick's.. sorry.
But as an alternative, what about Acana's Light and Fit?
http://acana.com/our-foods/heritage/light-fit/
It has 11% fat and 35% protein.
And also Fromm's Shredded Chicken Entree (canned)
https://frommfamily.com/products/fou...ical-analysis/
It seems to have low fat (not really sure how to read it, since it's based on per 100grams)
Not sure if this helps.
