One thing to keep in mind is the fact that yes, the fillial methodology was used to track generations from a original pairing. But nowadays I think the definitions is a little broader. It basically means any F1 pairing ( whether related or not ) =F2, F2xF2=F3 and so on. If you have a F3xF2, the offspring will only be F1's, because you are creating a different lineage ( according to the theory ). Technically these would be F1 Argentines, because they were from a mixed fillial breeding. Also the resulting litter between two wildcaught individuals would equal F1 offspring

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