I'd ask for a referral to a k9 dermatologist - skin issues can be incredibly complex, & a GP vet cannot hope to have the knowledge of a specialist in skin.
Vets are expected to know the anatomy, physiology, & diseases / contagions / heritable / developmental problems of multiple species, intimately; U know what vets call Doctors? -
'vets who treat only one species'.
"Silver" is actually a controversy in itself, & silver Labs are often the product of pretty severe inbreeding to get the color desired - especially
if both sire & dam were dilute [silver, champagne, or charcoal are respectively dilute-Choc AKA Liver, dilute yellow, & dilute black].
Do U know the colors of her parents?
here's some info on Silvers in general - https://www.labradortraininghq.com/l...dor-retriever/
see the 'comments' for some very informative & factual posts, as well as the article itself.
DILUTE colors in many breeds have health & skin issues - Blue Dog Syndrome
is a well-documented problem across multiple breeds, with a weak immune response [poor resistance to contagions or infections] & frequent auto-immune problems as these pups grow to maturity. Alopecia
/ baldness or thinning haircoat, is another of those problems seen in dilute-color dogs of many breeds, as are problems with claws, eyelids, eyelashes, nose leather, etc.
here is a resource page with many links to silver Lab info: http://www.phantomlabradors.com/inherit.html Color dilution alopecia
(CDA) can accompany coat color dilution, causing recurrent skin inflammation & drying, 2ndary bacterial-infections in hair follicles, & hair loss. https://en.wikipedia.org/wiki/Canine...ular_dysplasia
More on alopecia Hereditary Alopecia and Hypotrichosis - Integumentary System - Merck Veterinary Manual
I am concerned that she might be one of a litter with 2 dilute parents, & may have autoimmune issues as well - so fungal, yeast overgrowth, 2ndary & even tertiary infections would be possible.