Best chewy, dog food for a picky chihuahua?

My chihuahua (she's about 9 months old now) is a very picky eater. We get her the Royal Canin dog food for chihuahuas aged 8 months & up but she doesn't willingly eat it, we have to tie her up for her to eat it but even then she only eats like half the bowl (we give her about 5 spoonfuls). Apparently it's for the most pickiest of chihuahuas but not mine! She appears to like chewy foods better because she loves her chewy treats. What are some good recommendations for her?