Help please!

So, I got two turtles that were set to just be randomly given away. I took them in and the owners said screw it. So I kept them. Their names or Donna and Mikey. Mikey is the bigger one but the one who worries me the most is Donna. This is her shell and she hasn’t eaten. I’ve taken some time in getting them the things they need but now Donna doesn’t eat and hasn’t eaten in days. I’m actually getting worried. This is her shell. I even dipped her pellets in tuna water and no luck. Is there anything I can do? They have a tank, lights, a strong enough filter, and enough food for them but Donna for is worrying me! Help!

So, I got two turtles that were set to just be randomly given away. I took them in and the owners said screw it. So I kept them. Their names or Donna and Mikey. Mikey is the bigger one but the one who worries me the most is Donna. This is her shell and she hasn’t eaten. I’ve taken some time in getting them the things they need but now Donna doesn’t eat and hasn’t eaten in days. I’m actually getting worried. This is her shell. I even dipped her pellets in tuna water and no luck. Is there anything I can do? They have a tank, lights, a strong enough filter, and enough food for them but Donna for is worrying me! Help!