As-salamu alaykum,

It is quite natural for children, even adults to get attached to animals that are raised by the family. As your son developed a liking for the sheep, he is now grieving the loss of what he considered his pet. It is surmised insha’Allah that you and your family treat your animals very well alhumdulillah and your kindness and good care towards your animals has taught your son the proper way to treat animals as Allah commanded us, with loving kindness. However, we are often not prepared to deal with the feelings and emotions that follow when a cherished animal passes away or is offered in a sacrifice.
I am nit sure how old your son is, or if he is able to grasp the concept of sacrifices for the sake of Allah SWT, or even death, but I would begin by explaining to him the history and significance of Eid al-Adha, and how the sheep that he loved is special because it was chosen to be slaughtered. You may want to explain how Eid-al-Adha is a day of remembrance that commemorates Prophet Ibrahim’s (PBUH) willingness to obey Allah and that many Muslims sacrifice their best animal to eat on this day, thus making his sheep special. Assure your child that the sheep was slaughtered in the most humane way as is prescribed for Muslims. When discussing his feelings with him, try not to negate his feelings but rather express to him your acceptance of his feelings, share with him a time when perhaps you felt a similar way when a favorite animal was slaughtered or when someone or something you loved died. At the same time, teach him that it is normal to feel sad, angry and even depressed over a loss. While he blames you for the sacrifice, again refer to being obedient to Allah SWT, and how it is a blessing to be able to make a sacrifice. There are many books on this very subject that you can purchase and read to your child concerning Eid Al-Adha to help him understand as well as develop coping skills concerning his loss. A few good children’s book on this subject are “Little Batul’s Eid Celebration: The Most Pleasant Festival of Sacrifice” by Munise Ulker and “10 Different ways to Teach Children about Eid Al-Adha” by the Muslimah Mommy.
Engage your child in activities with other children surrounding Eid Al-Adha and the preparation, sacrifice and festivities. In this way your child may be able to relate to other children who also experienced feelings of loss over a “favorite pet” and thus learn the correct perspective from his peers and in turn develop coping skills should he become attached to another animal that may be sacrificed.