The dog wasn’t left for days. His parents drove down to Atlanta and had a key to his house.
“Commander Cunningham’s father and his mother, Tia-Juana Cunningham, 60, drove all night from their home in Waldorf, Md., arriving in Atlanta early in the morning on Feb. 14.”
https://mobile.nytimes.com/2018/02/24/us/cdc-employee-missing.html?referer=http://m.facebook.com/
Video - http://www.businessinsider.com/cdc-worker-mysteriously-vanishes-after-going-home-sick-2018-2
He went missing on the 12th. Parents arrived on 14th. That’s two days.