Texas Sheriff’s Office Honors Beloved K-9 With Traditional ‘Last Call’

— -- A K-9 working dog named Argo was given a touching tribute by his human colleagues before he passed last week.

According to a Facebook post by the Hidalgo County Sheriff's Office in Edinburg, Tex., Argo was “honored with the traditional Last Call, given to those who pass in the line of duty.”

Argo had bone cancer, according to the county sheriff's office, “but [Argo] refused to let it slow him down. Only after the pain became evident to his partner and the cancer was found to be all over his body and terminal, was the hard, painful, but loving decision made to end his suffering.”

Since it was posted earlier this week, the video has been viewed more than 700,000 times.

The dog had been with the sheriff's office since 2009, working as a Narcotics Detection Dog. Argo was credited with “taking thousands of pounds of dangerous drugs off of our streets as well as the apprehension of many dangerous felons.” He was partnered with Lieutenant Francisco Guerrero. Neither Guerrero nor the sheriff’s office responded to ABC News’ request for comment.

Argo will be honored publicly on Nov. 10 at the HCSO First Annual South Texas K9 Competition.