Puppy born with a short tail - Page 2

Thanks everyone for your thoughts, even though the general thoughts are leaning towards a simple mutation and not genetic I probably would not do a repeat mating just to be safe.

Maybe these articles will help you: 

http://www.kennelsiggen.com/KENNEL/bobtail.htm

http://www.wajoma.com/custom3.html

If it is a new point mutation ie. peculiar to the individual, then it will be genetic, but present only in the pup and not carried by the parents.  If it is a recessive mutation that occurred some time ago, then both parent will be carriers.

A developmental blip would not be genetic.