Sgt. Lewis Wolfe #129 in the group photo
He was "Cook" for the company, and from Nashville, Tennessee. I now believe the puppy's name was "Jack", as mentioned in the company history. It states that "Sims had the good luck to run across "Jack", the official 841st mascot. These were our days at Le Forestiere." He seems to be cared for by Wolfe here. But in the group photo, Sims is holding him in the front row, 2nd from left.
Cook: Sgt Wolfe with knives
Sgt Wolfe with company dog "Jack":
Sgt. Wolfe and U10
Sgt. Wolfe (middle) and 2 buddies (U11, U12)
Sgt. Wolfe (left) (U13) & Thomas Plant
Sgt. Wolfe and Thomas Plant
Sgt. Wolfe and Harry G. Cooper (from Savannah, Ga) (Cook is # 8 in group photo)
Sgt. Wolfe and 2 more buddies (U16, U17)
Sgt. Wolfe with rifle
Sgt. Wolfe and "Jack"
Sgt Wolfe on bicycle
Sgt. Wolfe, Jack (pet dog), and Brown