Yeah, and last night my elderly dog started losing her balance and we were afraid she was having a seizure or stroke or something. We called the vet and the vet assistant told us it sounded like a seizure and that by the time we got her in it would all be over. So she told us to wait it out and see if she was better in the morning. She wasn't better this morning. So we took her to the vet at 11:45am and he said is was some sort of balance altering syndrome that elderly large breed dogs sometimes get that sets on really suddenly and will get better over a few days to a week.
Also my cat did come home the other day just after dark when I was super worried. xD