I had to travel for one week and couldn't take my cat with me, so I left him with the lady who helps me at home. She took him home with her. I gave her all the necessary food, litter box, and everything she'd need. I was asked her to send me daily pictures of him. She told me he was very happy, but had less appetite than usual.
After coming back, I noticed that my cat is not as happy as before. He is more afraid to love freely, and sometimes squints with one eye. I'm scared that these are signs of being traumatized or hit for any reason. How can I tell if he's been traumatized or mistreated?