Crash course on sick Chin care (my chin is on Meloxicam and not eating much now)

I've had my chinchilla, Mr. B, for about a month now. I adopted him from a Chinchilla adoption center and he was a bright happy chin! Been feeding him Oxbow Essential pellets, timothy hay, occasional chinchilla safe dried flowers/herbs, and spoiling him with apple sticks, chew toys etc. Unsure of his history tho.

A few days ago he had some obvious mouth pain (rubbing mouth, loud/constant teeth grinding, wincing/flattening ears), I posted this in the other topic thread under health. After...

Crash course on sick Chin care (my chin is on Meloxicam and not eating much now)