You have to enter the location where you asked the question, or post a chart.
Actually, you have to post the chart. Just giving the details won't do, because for a horary chart to be valid, it has to be the only chart cast for the question. If all you post is the details, there will be multiple charts cast. Different people will see and understand your question at different times, and they'll be in different locations. That would result in different charts with different ascendants, different house placements, and different significators for you and the missing pet, which would make all the charts invalid.
Edited to add: The chart has to be cast for the time and location that you're asking the question. Not the time and location the pet was lost.