January 17, 2022 Jack is a sorrel/chestnut mustang gelding with a BLM brand that was picked up by NMLB as an estray. He is slightly wary of people, but has had some handling. He was picked up with Jill. According to his brand, Jack was born in 2018. Jack is a sorrel/chestnut mustang gelding with a BLM brand that was picked up by NMLB as an estray. He is slightly wary of people, but has had some handling. He was picked up with Jill. According to his brand, Jack was born in 2018.