daft question does having an overdue vet and farrier affect a horses placing?

I don't think so. I've had vet/groomer overdue for an entire week of shows several times and it doesn't seem to affect their placing or point gain.

yeah i dont think it matters for show placing either or at least not that ive noticed but you def can not enter shows if its not done.

 Itd be nice to update a day or 2 before they expire... 

Just coming in for a staff answer. ☺  Vet & Groomer/Ferrier only effect your ability to enter shows and breed.  It doesn't effect placing in shows. ☺