ANSWER:

One ram is sufficient for all those living under his roof. If they did not authorize him, they are not obliged to refrain from their hair and nails.

QUESTION: If there r 7 people in the family. No the main head who is the father is sacrificing 7 goats of each of them. Than is it necessary for other members of the family not to cut hair and nails. Or is it only 4 the person who is paying 4 the sacrifice? whether he is doing it for all of his family members. And his family members also recite takbeer on their sacrifice.. while sacrifice is done by butcher