UPDATE: this dog was probably laying on I-25 waiting for and hoping his friend, a dead shepherd mix in the median, would get up. I did not see the dead dog until I returned a few days later.
Found male black dog with white chest on I-25 milepost 339, 5 miles south of Las Vegas, NM. One mile south of Phillips 66 station at exit 339. I couldn't catch him. He was laying on I-25 at 1:30 pm today (Dec 23) so I pulled over thinking he was injured, but he got up and crossed all lanes of traffic. I drove around to the frontage road and found him again but he wouldn't come to me then scurried into a drainage. The last place I saw him was near La Manga Trail and the frontage road. I left dog food and sardines out for him. He was laying on I-25 near a wrecked car (an Accent) and I thought maybe he belonged to the car's owner. The cashier at Phillips 66 did not know of a lost dog and said the person with the wrecked car did not mention missing a dog (they were there earlier waiting for insurance company). I talked to a guy who lived nearby and he did not recognize the dog. But the dog seems lost and missing someone. Lots of his footprints in the snow and up to I-25 near La Manga Trail. Seems sweet. If anyone drives by the area please keep an eye out. If he "belongs" to someone nearby seems it's not a safe place for him.