A sheep whose fatty tail has been cut off is not fit to be offered as a sacrifice

No File Exists
Check below answers in case you are looking for other related questions:
Ruling on offering as a sacrifice a sheep whose tail or buttock has been cut off; what is the ruling if no intact animal can be found?
Offering udhiyah on behalf of the dead

No File Exists
Related Answers:
She did not offer udhiya (qurbani) for years; should she make it up now?
Sharing in a sacrifice
What should the one who wants to offer a sacrifice refrain from doing?
Ruling on offering as a sacrifice a sheep whose tail or buttock has been cut off; what is the ruling if no intact animal can be found?
Offering udhiyah on behalf of the dead

Recommended answers for you:
Reading Soorat al-Mulk protects one from the torment of the grave
Ruling on shortening the sides of the hair more than the middle
Ruling on drinking whilst standing
Being Successful in Life
Is it permissible for a woman to remove the pubic hair of another woman?