To reduce human-wildlife conflicts that result from animals becoming habituated to finding food in neighborhoods, feeding of wildlife is prohibited within city limits. For the full text of the ordinance, you can view Missoula Municipal Code 6.07.12. To report violations, please contact Missoula City-County Animal Control.
Some areas on the edges of Missoula have special requirements for garbage disposal because bears are present in or near these neighborhoods. If you live in the bear buffer zone (PDF), please familiarize yourself with the requirements in Missoula Municipal Code 8.28.085.
Fencing can be an effective way to keep deer out of your yard. Fence regulations are set out in Missoula Municipal Code 12.30 with additional resources available on the fence permit information page. Montana Fish, Wildlife, and Parks also has good information about making your yard less welcoming for wildlife.