How much value does a pig wallow add to a Burbank home for sale?

Here's my pic of one of the open house hosts I encountered yesterday when showing property in Burbank.  I don't know if this is a he or a she, but Piggy was quite friendly and polite.  Unfortunately, there was no indication on the mls to indicate that the home features a pig wallow.  Too bad as it might add value to the home.