Photo Credit: @hicarsondogs / Instagram Rambo finally has someone to himself for a little while, and he makes the most of every second. The 90-pound, 4-year-old dog spends time in the shelter yard with a volunteer, leaning into her and climbing into her lap. He even hands out kisses as if this is simply what every afternoon should look like. But there is something she knows that Rambo does not. The shelter dog has less than 72 hours before his e…