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Oregon is one of the most lenient states when it comes to owning and breeding non-native wildlife. It should be no surprise that they have an extensive list of what animals they will allow to be owned and what is considered illegal.
For example the mongoose is illegal and the ferret is legal. In fact many wildlife species are considered as domesticated animals in Oregon. There is a 25 page document that lists all of the animals that are illegal and legal to own in Oregon. The link is below.