Q: What can I not do, if I want to slaughter an Udhiyyah?
A: When the 10 days of Dhul Hijjah begin, it is impermissible for the one who plans to slaughter or have a slaughter done for them to remove any hair, nails, or skin until they slaughter. It is also recommended to shave one’s head after they slaughter as an act of glorification for that day. Source: Sharh al-Muntaha
This answer was collected from HanbaliDisciples.com. The questions have been answered by Imam John Starling.