
I would not class foreign breeds working breeds not registered with our kc as not being approved of by the KC, more a case as no one has put in the work (for whatever reason) to get them put on the breed register.
In some breeds there are colour restrictions.
French bulldog, bulldog, chi, Bull terrier, Mini bull terrier, Staffordshire bull terrie, - will not register merle
Cavilear king charls spaniel - if breeding two blenheim parents only blenheim pups will be registered (genetically the only colour possible from paring)
Dalmatian - won't register black spotted pups out of two brown spotted parents (as its not geneticaly possible)
Dobermans - any dog/pups white ancestry will have (WHITE ANCESTRY) after there colour on there papers. But doest say they won't register whites though.
Rough collie, Sheltis, Pyrenean Sheepdog, Cardigan corg, Border collie, Smooth collie, Aus show, Dachshunds,- won't register litters from merle to merle breeding
Beauceron - no tri colour to tri coloir breeding
Labs - won't register black pups a from two chocs, and if breeding two yellows will only register yellow pups
Then there are some breed specific health restrictions on registration
Briad - all breeding dogs must be hereditary clear or tested for CSNB, and carriers only to be bred to clears.
Cardigan corgi - will only register one's clear for PRA-rcd3
Irish red and white setters - will only register one's clear for CLAD and vWD
German wirehaired pointer - will only register one's clear of vWD
Irish setters - will only register one's clear of PRA and CLAD