When a pet dies, sometimes you try to minimize the loss to yourself or others. Maybe you feel guilty for feeling so sad, or embarrassed about the depth of your grief, or like you should be over it, since it’s just a cat or dog.
These feelings, not the grief, are the unhelpful ones. We mourn the loss of things, or people, or beings, that made our lives beautiful and happy. Don’t beat yourself up for loving and missing a pet. That sadness is a sign of your humanity.