Whilst times are normal, I feel that many neighbours or friends would object to the raising of guinea pigs for eating.
These animals are widely kept as pets in the West, and are regarded as "cute, cuddly, or friendly" and therefore not to be eaten.
Who cares after TSHTF, but perhaps not the best choice whilst times are normal.

Morally, I dont think that eating a guinea pig is different from eating a chicken or a rabbit, but many dont see it like that.