Disabling feeds on WPMU Dixi Theme

We currently have a multisite using the Dixi Theme.


We would like to disable feeds for a specific site (see the link above). Just for testing purposes. However, we don't want to disable feeds from all the other subsites.

I have a few links:
Code: http://www.wpbeginner.com/wp-tutorials/how-to-disable-rss-feeds-in-wordpress/

Plugin: http://wordpress.org/plugins/disable-feeds/

Would either of these work? Something else?

Thank you.