Location for a summer event litter

[SmokyQuartz]

Which part of the summer event are pets from this litter added?
https://static.chickensmoothie.com/arch ... &bg=99c57c

[iron maiden]

Those are located at the library for 4 coins, I also recommend looking at this thread if you need to see any other locations!
Forum/viewtopic.php?f=108&t=5066504

[SmokyQuartz]

Thank you so much for the info! I didn't realize that thread existed I'll keep that in mind for future events!