firstly, i need to point out that things are very different over here (as i'm sure you all know), but as a rule, a season has to be skipped- or you must wait a year- between litters. our kc will only register one litter per year, and age limits as well, but as of 2012, they are going to reduce the limit to 4 litters in her lifetime instead of 6. and hopefully the laws will follow suit! they will allow 5 or 6 under exceptional circumstances- i supose if its 2 champions fully health teated etc. but i'm sure that will be a very infrequent occurance.
what with ireland being one of the puppy mill capitals of the world, it is always assumed when you see ads saying 'parents kc reg, pups not' you always assume this is because they have overbred (to the kc standards) - or that there are endorsments on the parents- and is therefore to more than likely be avoided.
here is the link if anyone wants to read it...
Kennel Club Takes The Lead On Litter Limits For Bitches - The Kennel Club
does akc have anything like that enforced? or can all litters be registered? sorry, i think i have asked that before, but not entirely sure!