(Query published as received)
A. If a sheep is more than six months old but less than a year, and physically appears to be one year old it will suffice for Qurbani. (al-Fatawa al-Hindiyyah, Vol: 5, Pg: 297 & al-Mabsoot, by Sarakhsi, Vol: 12/4, Pg: 9 – 10/141, Darul Ma’rifah)
The condition is that the sheep must be at least six months or older and it must be so big in size that it resembles a one year old sheep. If it is small and does not resemble a one year old sheep in size, the Qurbani will not be valid.
And Allah Knows Best