Why I loose points?

In the morning I have a score (91) but with my great surprise after a short time I see that the score is dropped!!!
It’s happen many times with any kind of creature
I looses a lot of time and money for nothing so I decided to stop my game!
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Hey Evelyne_Joyce, I’m sorry to hear that happened. Our team would be happy to take a look at your account and see what might have happened to those DNAs if you emailed them at support+forums@ludia.com with your support key.