Contact Sherriff make a report give him time to contact owner, say 14 days. Unwritten rule in a tricounty area where I live, after contact is made allow another 14 days for owner to stop cattle from trespassing. After that gather all cattle on your property, take to local sale barn in owners name but have check mailed to your address. Now you hold his check till damages are paid to you. This is not legal advice but know many that have done it and the local Sherriff's support it