I’m not sure about the laws, as the ranch spans NM and TX.
We made a lost cattle report in Texas at the county level, so no think they’re mine at this point. But NM is weird.
They can easily clear a fence. They just stay because they want to.
ah yeah, nm is another country- they’d probably be able to tell somehow where they came from by what they ate or whatever- Although possession is 9/10’ths of the law supposeldy. But not sure courts would agree