Go database helper code
What do you think about error handling? I think that's good idea to provide some log messages for main operation with db (CRUD). 

As example for Delete function:

func DeletePet(pet *Pet) {
    num, err := orm.NewOrm().Delete(pet)

    if err != nil {
        log.Println("DELETE", err)
    } else {
        fmt.Println(num)
    }
}