Yesterday I scheduled Tigh's neutering for the end of September. He will be six months old the first of September but we are giving him a few extra weeks to allow his teeth to come out ( currently he still has retained most of his baby teeth). I have arranged for him to have "pre op blood work" the week before. The office asked if I wanted it done the week before or the day before. I wasn't sure what to say. Are there specific labs I should make sure are done?