Hi Joshua ,
Accordingly to the command reference:
"By default, the DHCP snooping feature is inactive on all VLANs. You may enable the feature on a single VLAN or a range of VLANs.
You can configure DHCP snooping for a single VLAN or a range of VLANs:
•
To configure a single VLAN, enter a single VLAN number.
•
To configure a range of VLANs, enter a beginning and an ending VLAN number or a dash-separated pair of VLAN numbers.
•
You can enter a comma-separated list of VLAN numbers and dash-separated pairs of VLAN numbers.
"
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/configuration/guide/book/snoodhcp.html
Hope it helps
-Randy-