At about 11:30 last night my boxer woke up kinda with a choking sound, I got her up and out to the kitchen to get some water she then proceeded to basically colapse and pee on the floor . She had no control over her back end.It took her a minute to walk to me then she laid on the floor. I waited after about 5 mins she got up left the room laid down again .Iwalked over to her put my hand onm her back and she had a blank stare she made a rumbling sound deep in her chest. I kept talking to her and you could see the recognition come back. We stayed up with her almost all night but thankfully it didn't happen again..After about 20 mins she started to play with our chocolate lab puppy.Any clue??