Small breed sensitive stomach chicken dry food

Hi, does anyone feed their small dogs the dog food meant for small breeds that's the pink members mark food with a yorkie on it? I've been wanting to try it for awhile. My local sams club doesn't have it for some reason. I've been wanting to switch but idk how good the good is tbh? the dog food subreddit here says the company that makes their food isn't good??? Google says it's the Diamond company.

Costco has a small breed dog food as well but I see that the one ppl are saying is good at Costco is the regular adult chicken one. Not the other options.

My dog is a toy breed and absolutely won't eat kibble that's too big for her mouth. She's 4 lbs of sassy.