i breed manx to manx for manx, i'm now in the process of breeding it out. manx is one of the fastest improved traits in aus mice. from 1 male carrier i achieved a complete lack of marks/bald spots, let alone stubs in 3 generations. two father daughter matings (mums were tailled sisters, also carriers inherited from dad), and the best pair from the two litters produced the best manx i have ever seen. to get frequency of good manx in litters it is necessary to back breed. carriers can be used with good manx without too much harm to the tail/lack of tail quality but frequency is lowered. whatever u choose to do with manx be considerate of the animals. the only prob i have ever encountered is the somewhat slower passing of faeces, they seem to hang there for just a little longer. my assumption is muscle wastage from lack of tail activity. manx are beautiful and popular because they're still seen as relatively unusual, have fun