Perhaps they are pet owners, too. If they're willing to listen, tell them about your pet - the good times, the bad times, and the way it ended. Talking about your loss will help you feel better. Send a pet sympathy card. Share memories you have of the pet.
Varied feelings can follow the loss of any loved one, including a pet.
Initially, you may be in shock and unable to accept the loss. You may blame yourself or wrestle with feelings of guilt or anger. There is no standard route for working through grief. The stages represent phases of the healing process. How you personally proceed through them, however, will depend on many factors.