Most vaccinations are good for more than the 3 years vet's recommend for revaccination.

Rabies, don't bother. It's to protect the dog in question. Do you really think your momma bitch will be tangling with wild animals infected with rabies between now and when the pups go home (4 months)? She's not going to be passing on rabies prevention to her pups.

The others, honestly, the antibodies last longer. If she's healthy, she should pass on a good natural immunity.

Was always told by various vet college specialist etc that should never vaccinate a bitch that you will be breeding within 10 weeks of an expected breeding. This gives her body time to heal after the immunological assault from the vaccination.