Any tips on snake proofing my run?????

[Desert Rooster]

While outside with my chickens today, my chickens started making their " WHAT THE HECK IS THAT THING" clucks
so i looked over to see what they were looking at, and it was a yellow snake passing by the run, i couldn't get it because it went into some bushes next to my house.
I looked for it for a while but couldn't find it, so my question is, is there a way to secure my run to make it snake proof???

Here is a picture of my run

 

[colebarnhart]

If you put some hardware cloth around the bottom border of the run area, I would think that would keep out any snakes.

http://www.homedepot.com/h_d1/N-5yc...splay?langId=-1&storeId=10051&catalogId=10053