I'd put that little think on real food. He would gobble at every meal and be much healthier for sure.
If you have a sling, then just carry him around during the day, and then keep him in a tiny crate on your night stand at night so you can hear him if he whimpers. I wouldn't put anything around his stitches that would not be good for him in case he does lick it. It should heal on it's own in just a few days.
As for something to chew, try the small Himalian chews from Ryan RDB911 here on YT.
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Good luck with your baby. I know he will thrive and do beautifully!
