
This is always going to be a controversial subject, as while the simple answer is "no its not acceptable to breed back to back" there can be lots of different circumstances which may make it allowable. For instance, I have just had a litter from back to back season matings, first litter of 5, 2nd litter of 6, HOWEVER, whilst the bitch was mated on consecutive seasons, the pups are 14 months apart in age, as the bitch has extremely irregular seasons (she is now 5 and this was her 3rd ever seasosn), so obviously I think that the gap between seasons as well as the fact they are consecutive is a factor. Then, as in the original post, the singletone puppy issue - I dont see a problem, if a bitch has whelped only 1, and reared and recovered well, (and always providing that there was a gap before any previous litter) that a litter cant be considered on the next season, especially if there are other factors like a stud only being available for a short time. It comes down to the condition of the bitch, i think, as in my experience most recover much more quickly from singleton litters.
bye
Gwen