I've noticed this befor, but it has become very noticable this week with the flamingo challenge. Both CC gain from releasing to the wild and animal star rating change as soon as you place the animal in the trade center! Is this intentional or a bug? it's very annoying 
Exampel;
This flamingo just became an adult. As you can see, she has a silver rating
If i deside to release her into the wild, I would get 19CC for it
This is the same Flamingo in the trade center! Now she doesn't have any rating at all and is only worth 9CC for releasing???
The rating thing mostly seems to happen to silver animals. I only put bronse, silver and gold animals in the trade center, the ones with no rating I release as soon as they grow up. Yet in the trade center I have loads of flamingos without any rating and hardly any of them are silver. I hope this change soon and that it is indeed a bug and not intended, cus that doesn't make any sense to me
Exampel;
This flamingo just became an adult. As you can see, she has a silver rating
If i deside to release her into the wild, I would get 19CC for it
This is the same Flamingo in the trade center! Now she doesn't have any rating at all and is only worth 9CC for releasing???
The rating thing mostly seems to happen to silver animals. I only put bronse, silver and gold animals in the trade center, the ones with no rating I release as soon as they grow up. Yet in the trade center I have loads of flamingos without any rating and hardly any of them are silver. I hope this change soon and that it is indeed a bug and not intended, cus that doesn't make any sense to me