A new option added to the product record in VetlinkSQL version 4.2 is the 'Reporting' option. 'Reporting' products are items that have no stock or prices and are used primarily as a counter.
When a 'Reporting' product is added to a bill you enter a quantity but no prices. Therefore the client can see the number of 'Reporting' items used/done without those items being specifically billed for. You can then use the reports for analysis on the 'Reporting' item to find out how many times it was used/done in a given time period.