Just HAD to update about this.
This groundhog has been terrorizing my grandparent's garden for the past few months. After letting Loki go after the groundhog a few times, then sniffing out the groundhog's living area (under the huge pile of dead logs, sticks and branches behind the woods), we finally caught the groundhog by strategically placing the trap (with two rotting peaches) right outside its door.
Loki was going NUTS over this thing when we caught it. I had to place him in an abdomen wrap with his leash because I didn't have the gentle leader on me and he was literally dragging me through the backyard to reach the groundhog.
Anyway... here's his new pet (which will be promptly released into the township park tonight).