Can stealing the pets be tracked legally?

• According to Islamic punishment law stealing means robbing the property which is belonged to others. Therefore, the issue of stealing should be of the financial value. In the Iranian civil law, property has not been defined, however based on the definition which is rendered by law specialists, prosperity is of two conditions: 1. It should be useful and meet the needs (financial or emotional) of someone 2. Can be devoted to someone. Based on this definition, it is possible that something be useful for someone and meet his/her financial or emotional needs but it doesn’t have such value for others. Therefore, since based on the international research, pets (like dogs, cats and Costco) can prevent or be a remedy to some emotional problems and depression, or they can prevent Alzheimer and have a special place in psychological science (pet therapy), therefore they can meet the needs of someone and stealing them can be followed legally.