Ah, but a live (or recently deceased) pack animal is not a minimal amount of meat (and, as I said, it's backup for failed Survival rolls). Even a
miniature donkey weighs in at over 80 kg (over 160 lbs
Link). It's far from the minimal meal I painted. Feed the wolf first thing in the evening when making camp, then let it take seconds before leaving in the morning, and it can take two full meals from the one animal.
Further, with Jacob's Survival roll (+5 from skill, +4 from Wisdom, +2 from Nature Sense) he can probably butcher and preserve the meat sufficiently for it to last a few days, so the poor dead donkey can be eaten twice.
Edit: for that matter, treating the wolf as a character, we have a party of four - which is a DC 16 survival check (10 for Jacob, +2 for every additional character - sort of - see
Survival Description) so Jacob can fully supply the party while moving at half overland speed on a roll of 5 or more (80% of the time) or on a roll of 3 or more once aboveground (+2 synergy from Knoweledge(Nature) 90%). If Jacob puts priority on himself and the wolf, he will ALWAYS make a sufficent roll, barring penalties (10 + 2 = 12 for the minimum; minimum roll on a d20 is 1, Jacob has a bonus of 11; 11 + 1 = 12)
Edit 2: oops, forgot this plot thread's NPC - that's a party of 5, DC 18