What can I feed to add depth of body?

We have a steer that’s super long so he doesn’t look deep enough to me. Show isn’t until March so he may be fine with more weight but what can I add to his feed to help add depth? We are currently feeding finished and cotton seed hulls.

We started using Purina Ultra Full part of their High Octane line. It takes about 45-60 days to really get results but the longer we feed it the deeper the calves got. What I like is it gives depth to the flank.  I really like it and recommend it to all my costumers. We also feed a lot of Pre-Con which I believe gives them great spring of rib.