Again (as per my comment last week), no predators in Fiji of a size to tackle a chicken, unless a feral dog got away from a village or something. From this site: "Mongoose, cats, pigs, and rats are efficient predators on native birds, reptiles, amphibians, and invertebrates, causing greatly diminished populations or extirpation on islands. Taveuni is the largest island without mongoose at this point, and Gau is still free of feral pigs. " I don't know what island they are on and whether there are even any permanent inhabitants. (per Wikipedia, "Fiji consists of an archipelago of more than 330 islands—of which 110 are permanently inhabited.") I expect they tend to choose uninhabited ones for camp sites (and fly or boat them over to village-based rewards).
Not that I approve of what Wendy's doing, even though I myself don't eat chicken. But she's not dooming them to meet nature red in tooth and claw.
I said to my son that Rick was just going to walk up there, read the signs, and grab the torch without hesitation and turn left. And he did! No "F those guys," no "dear Jesus dear Jesus," just a silent thought "okay then" and here we go. (I don't mind Rick and certainly liked his pairing with David much better than Kelley's two bonds).