Ok...My boy is 11yrs n NO hes NEVER had a dental cleaning...But I want to get him a dental cleaning done soon...Every VET visit in the PAST...the VET said his teeth n gums look good...But I know cats are good at hiding pain...So I want to get him a cleaning done...What exactly will happen when they start...n how can it affect my boy being hes NEVER had a cleaning...Besides being good health wise..Any advice..tips..Appreciated