My family Vet of 30 years always recommended removal of
dog's anal glands at the same time he did the neuter. Patients
always had the option of not doing it, but we always did. There
was never any negative consequences. It's a pretty simple
surgical procedure. I'm always surprised that some Vets never
offer that option. He explained how to express the glands & it
didn't take me 2 minutes to decide to have it done.