It could have been the stray cats. If a living entity stands on top of turtle eggs for too long they will be trampled, meaning they will be gone and...
This depends a lot on the cat's personality. Some previously outdoor cats actually prefer to be indoor cats as they feel more secure. The trick is to provide ample opportunity...
A truly feral cat is unlikely to adapt well to an indoor life. A feral cat is uncomfortable with human company and may well feel trapped and be very unhappy....
You can certainly make friends with a chinchilla, given patience and the right attitude. Clicker training may also help as you can reward any signs of boldness by the chinchilla.