That’s exactly what I was going to say! Also, not only are ferrets not strong enough to scavenge, they often wouldn’t choose to anyway, because after their first year of life, anything that hasn’t been given to them as food is not perceived as food. The only wild ferret is the black footed ferret, a completely different species, which is very endangered (even the wild version doesn’t fare too well in the wild!), and does not live in CA.