I use Honest Kitchen which is dehydrated. There are lots of different proteins or you can buy without protein and add your own. I've been using Keen which is a turkey protein it's not grain free but it is affordable.
Lakota - WGSD 1/13/10
Wolfen - WGSD 12/31/14
Bull -WGSD 2-10-10
Apache - Shiloh Shepherd 12/15/02 - 6/9/15
Kiya - Shiloh Shepherd 5/15/04 -12/19/25