Unfortunately cattle can harbor rabies for long periods of time before showing symptoms. Be very,very careful - rabies is transmitted by contact with saliva in cuts, bites or mucous membranes.. While cattle usually get the "dumb" form of rabies, which causes lethargy an the appearance of choke, they can get the "furious" form and behave aggressively.
http://www.beefmagazine.com/health/be-aware-rabies-warning-signs-cattle
Thanks 1muttsfan! I figured youd know about that.