Quarantine question

I was reading the quarantine sticky and learned a whole lot. But I was just wondering if a new snakes comes in and let's say it has no health problems can it still cause health issues for your current snakes or it is strictly procaution ???

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Originally Posted by masterorder19

I was reading the quarantine sticky and learned a whole lot. But I was just wondering if a new snakes comes in and let's say it has no health problems can it still cause health issues for your current snakes or it is strictly procaution ???

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How do you KNOW it doesn't have any health issues? It is the unknown hidden health issues that are the risk and why you QT new animals.