Add all the animals to a family.
Organise the names of the sounds so they are easy to use.
Add a instance variable 'Scream' to family, type = text
In the layout, click each animal, change the value for 'Scream' to the name of the audio file.
In the events.
Mouse > On object clicked (family)
Audio > Is tag playing (inverted) .... tag = str(family.uid)
____________Audio > Play (by name) ... name=Family.Scream .. tag = str(family.uid)