7:16 AM PT -- 6/20 -- KT Smith took to Instagram and shared that the dog, Legend, was dropped off to a new family that lives on a farm, where he will live out the rest of his life.

She wrote, "I couldn't have asked for a better family for him to be loved on by. and they're east Tennesseans so we can visit any time we need to. Thank you guys again, for helping but for also crying with me and lifting me up."

Morgan Wallen's son Indigo took a dog bite to the face ... and now the boy's mother is looking to rehome the pooch.

The country music star's baby mama, KT Smith, says her Great Pyrenees bit the two-year-old child she shares with Morgan, and the kid needed stitches.

Morgan's ex says the dog, Legend, is a rescue ... and she doesn't want to put the dog down, as some are suggesting.

KT, who lives in the Nashville area, says she is instead looking to rehome Legend with a family that has a lot of land and no small children.

The dog-biting incident happened Sunday and KT says her pup had never shown aggression before. Still, she says she just can't keep the dog in the house knowing her and Morgan's son may be traumatized.

As for Morgan's kid, Indigo's mom says he will be OK ... though he may come out of this with a scar.