18 year old dog walking in circles

[patsdogs]

A freind of mine has a dog that is 18 years old. That walks around in cirles stands in front of fridge or in a corner seems to be losing it balance. This dog eat very well. Still plays when she comes in from outside. she drinks alot of water. was scratching it ears about 6 months ago but that has stopped... the dog seems to be in no pain.. My g/f is on a fixed income and will not bring the dog to the vet... Is there anything that I can do to help this poor old girl..... She seems to be getting worse eveyday... It is heart breaking to see ,.,,,, does anybody have any ideal what is wrong with this dog...