Why are pug's tails curled?

Yes, a pugs tail always curls, if breed to do so. Some people find the spine curveatrue unnceccsiary and outbreed out of there pugs. You can always tell if it will curl if the parents tail is curled than your pugs will most likely curl. Although, it can break its tail and then, it will never curl again. Yes, a pugs tail always curls, if breed to do so. Some people find the spine curveatrue unnceccsiary and outbreed out of there pugs. You can always tell if it will curl if the parents tail is curled than your pugs will most likely curl. Although, it can break its tail and then, it will never curl again.