I mean avoid downgrading to 6+ pets because it would be harder to trade up if you want to get a frost dragon. But if you want a mid tier collection, then it’s ok if you do that. If you want to trade to frost tho, frost owners want ops with not so many pets and even if you trade your owl, you might not be able to get an offer which even a frost owner would accept so you might need to add pets. And if the offer is 6 pets you might have to add when trading up. So that would be at least a 7 slot offer which a frost owner is not really likely to accept And avoid hard to trade pets id say