retained deciduous canine teeth maxillary

Hello,
Does anyone have information about retained deciduous (baby) teeth in a dog?  I have a friend with a year old yorkie-pooh who still has upper baby canine teeth.  There is quite a bit of gunk built up in between the permanent canine (fully erupted) and baby canine.  Every bit of research I have done online suggests removal- but she told me that the vet she takes her dog to said that it was fine to leave them.  thanks

[ginger899]

Sorry your question went down the list without an answer so far!

It is best those retained baby teeth are taken out. They may cause a bad 'bite' (malocclusion) where the teeth are set at the wrong angles.

[bumblebee49]

They retain teeth should be removed. The food and gunk get's cault between the adult and baby teeth witch is not good for the adult teeth. Add's to bad breath and can also misaline the adult teeth.