In 2014 Egypt Event, there is a trade-in give you either a newborn sand cat that grows into one of 4 outcomes or a pps sand cat.
While this one has an exception to get an instant pps, but technically the newborn one still have 4 branches to grow into.
In 2016 Space Event, this one oddly has 1 split per each puppy but eventually ended in have only 4 total outcomes.
Though we got only a few examples, but these at least can make conclusion with a short sentence: "There barely will be a split for macaws."
Finally, so you'd better to wish toward next Halloween if you want to see the real split tricks . : ^ )