I have 4 quite new male guppies who all have beautiful tails and I'd quite like to keep them that way! We got them from two different specialist LFS and most of the guppies in their (all male) tanks also had nice intact tails, but at chain pet shops I've noticed that most of the guppies have really ragged and chewed up looking tails. Is it down to poor care such as bad water quality? Disease e.g. fin rot? Nipping from other species? Nipping from other guppies? Or is it something that can just happen with age? Also would a chewed up tail grow back with time?