Symtoms may include tilting of the head, leaning or falling without a reason, vomiting or excessive salivating. If you see this it is best to get it to a vet.
If you find your dog with symptoms of head tilting, falling or walks as if drunk, ataxia, vomiting, deviation in one eye, salavation, nystagmus, rolling, take it to a vet.
Symptoms of vertigo in dogs:
Head tilting
Leaning/falling/tilting
Ataxia
Vomiting, salavation
Deviation in one eye
Nystagmus
rolling.
If yor dog shows signs of any of these symptoms you should see a vet immediatly.