whitehood
Warren Veteran
Dental problems often affect the back teeth, so you wouldn't be able to see by watching him eat.
There is a good thread on symptoms of dental trouble here:
http://forums.rabbitrehome.org.uk/showthread.php?t=287479
to be honest if the only thing is him moving his mouth around, I wouldn't worry - although it's always good practice to have their teeth looked at when they go for vaccs anyway, just in case.
Thank you that's helped.