The Pony Princess (Paint x Percheron) has dreads in her tail but even more so in her mane. I have had her mane braided (just big pigtails, not show braiding) since the last time I washed and combed through it. One of the rubber bands broke – on day one, the “freed” hair was still in a loose braid. On day two, it had UNbraided AND rolled itself into a dreadlock. Siiiiiiigh.
My friend’s Paint gelding has the crimped look to his tail which I LOVE – and it doesn’t seem to result in tangles and mess quite the same way dreadlocks do.