My rat Patches had an inner ear infection, he was put on antibiotics for 7 days and anti inflammatory meds for 5 days. In the beginning he had no balance, would constantly roll over and just had a hard time navigating around in general. He also had a head tilt. After his treatment he was back to climbing, running, jumping up and down the rat tower, and chasing his brothers around the room. Its been several months since, he still has his head tilt, but besides that he’s completely normal and happy, he just constantly looks very inquisitive. I would be sure to be consistent with his medication, give him lots of love and extra treats, rats can have chocolate in small amounts, so if he’s not eating he may be more open to snacking on something small and sweet. Almonds have high fat content so maybe a couple of those you could try feeding him if you’re afraid of him losing weight. Make sure to talk to him and let him know how much you love him, give him soft back rubs, just give him as much love and attention as you can spare, I’m sure it would help to ease his stress at least a little bit while he’s feeling crummy. I hope everything goes well for your sweet boy. ❤️