Var det verkligen fläsk?

För att komplettera @ JADs svar , finns det faktiskt lite förskuggning medan Bran är warged till Summer när han kommer över de döda. Kapitlet hänvisar till de döda som kött mer än någonting och Bran tycktes till och med tycka om smaken av den.

Sleep would not come, could not come. Instead there was wind, the biting cold, moonlight on snow, and fire. He was back inside Summer, long leagues away, and the night was rank with the smell of blood. The scent was strong. A kill, not far. The flesh would still be warm. Slaver ran between his teeth as the hunger woke inside him. Not elk. Not deer. Not this.
...
Men. The stink of them filled the world. Alive, they had been as many as the fingers on a man's paw, but now they were none. Dead. Done. Meat. Cloaked and hooded, once, but the wolves had torn their clothing into pieces in their frenzy to get at the flesh. Those who still had faces wore thick beards crusted with ice and frozen snot. The falling snow had begun to bury what remained of them, so pale against the black of ragged cloaks and breeches. Black.
...
The direwolf did not care. They were meat. He was hungry.
...
The prey as well. He went from man to man, sniffing, before settling on the biggest, a faceless thing who clutched black iron in one hand. His other hand was missing, severed at the wrist, the stump bound up in leather. Blood flowed thick and sluggish from the slash across his throat. The wolf lapped at it with his tongue, licked the ragged eyeless ruin of his nose and cheeks, then buried his muzzle in his neck and tore it open, gulping down a gobbet of sweet meat. No flesh had ever tasted half as good.
A Dance with Dragons, Bran I

Strax efter att han haft något av köttet själv väckte han av flammorna och lagade kött och berättade om "grisen". Det är viktigt att notera att det här kommer senare i berättelsen efter att Bran har kämpat för att sätta sina egna behov ifrån sig Summer's, vilket också var att han verkligen njöt av att äta den nya döden tidigare.

"I'm sick of frogs." Meera was a frogeater from the Neck, so Bran couldn't really blame her for catching so many frogs, he supposed, but even so... "I wanted to eat the deer." For a moment he remembered the taste of it, the blood and the raw rich meat, and his mouth watered. I won the fight for it. I won.
...
"I will. I'll remember. I could go back and do it now, if you like. I won't forget this time." But I'll eat my deer first, and fight with those little wolves some more.
Jojen shook his head. "No. Best stay, and eat. With your own mouth. A warg cannot live on what his beast consumes."
A Storm of Swords, Bran I

Som motsatt punkt: grisar flyr från gårdar och lever ganska bra i vildmarken. De kan vara störande djur, faktiskt. Det har funnits gårdar norr om väggen, så ibland kan grisar ha runnit och startat en befolkning. De kan till och med förutbeställa Wallen.