I have 2 labs and they have both been under the weather as of late..The youngest 2 yrs old started acting like she was "drunk"..Not falling but sort of walking and appeared disoriented..Took her to the vets and was told that she has a mild form of epilepsy..They also told us unless they become frequent, more then twice a minth we might want to consider putting her on meds for it but for now not to go that route..At that time she appears "drunk" we always lay her on her side and at that time we have noticed that she has tremors for approx. 30 seconds to 2 minutes..Hope that helps..Jill