Number one, I would never add geckos to your existing tank without a quarantine period (45 to 90 days)

Second, I have to wonder why you didn't check to see what sex they were to be safe before buying (unless they are babies?)



Third, I have only seen that type of reaction (with the tail wagging) when there was going to be problem with them... not necessarily outright fighting, but territorial issues and bullying. The only females that I have had get along well were those that ignored each other from the start.



Your gecko is freaked out because of the new intruders on it's territory. If you do decide to keep them together, rearrange the tank and get more hides to allow each of them to choose a warm, cool, and humid area without having to share. Watch carefully for signs of bullying such as one not allowing another to roam freely without being frightened back into hiding, chasing another away from food, or hogging food. Not all females get along, so use a divider or get another tank if you see any problems starting.



Are they all the same size? Never put them together if there is a difference in size or weight. If they have parasites, which is common, you may have to get all three treated. Stress can cause a small parasite load to bloom into a larger problem, so if any stop eating or act lethargic, you may want to get a fecal exam.



I wish you luck with them, and I hope it all turns out OK.

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