
The breeder can't put an endorsement back on, unless they actually own the dog and it is physically in their possession. it's the owner fo the dog that can place endorsements, so that would be the breeder of a litter, as they own the pups at the time they apply the endorsements.
Lets say for arguments sake I owned a stud dog and then decided to re-home it, I could apply the breeding endorsement to it's papers so that the new owner could nto use it to breed registrable progeny.
Not that I re-home adult breeding stocks, but for example someone may feel their dog has already been used enough, or a failing has manifested in the offspring that they do not want perpetuated.
In a way this is the weakness with the endorsement process, once removed you have no more control over how your stock is used.
there are cases where bing able to remove endorsements on a per litter basis would be an advantage. For example in the case of an animal that has Carrier status for a particular recessive genetic disease, it would be good to be able to ensure that the animal could only be mated to a clear partner..