Read the following context and choose the best option to answer the question.
Context: She would do it sometimes when I opened the fridge door or whenever she heard the sound of a bag being crumpled ( thinking she was about to get hay or lettuce ! ) . Now I open the fridge door and automatically I am waiting to hear her , but I do n't hear a thing . Except like just tonight , I heard her .
Question: What may be the reason for hearing their pet when they open the fridge door ?
Options: 
- Their pet likes the coolness of the fridge .
 - Their pet is thirsty .
 - Their pet is hungry .
 - None of the above choices .


Their pet is hungry .