What is the ruling on six people sharing in the sacrifice of a cow as an Udhiyah for Eid, when it is one year and nine months old?

The madhhab (view) of the majority of scholars is that a cow suffices for seven people in the Udhiyah (sacrifice). For it to be sufficient, it is a condition that it has completed two years and entered its third. Therefore, a cow that has completed one year and nine months has not reached the age of sufficiency and will not suffice as an Udhiyah, whether for one person or more.