Fancy Rats Forum

I have a White Mice his name is Shaun and his boy lately when i try to play akinator online and developers’ website on PC SHaun always stay besides the keyboard and just watch to the monitor then when i try to eat him some feed shaun don't want to eat and i dont know why maybe he's full but its the perfect time to feed shaun suddenly shaun get vomiting.

Does anyone know how to deal with this

This is a rat forum, not a mouse forum, so this thread is off topic and will be locked.

Incidentally, rats can't vomit but I don't know about mice! If you have any concerns about your pet, please go to a vet.