Altered pets have horrible coats after a year, we call the spay coats or nuetered coats.
they can be a nightmare if you dont make it a four to six week chore to do a complete job.
dogs that are unaltered have the necessary hormonal surges, that keep the coat correct and healthy.
as a groomer, i have seen so many times, pets that had gorgous coats, than spay or nuetered, a year later the coats were high maintenance due to hormones taken away.
vets deny this up and down so people do spay and nueter.
i make sure my people know this is fact, a year after alter the coat will not be the same.