I wondered if anyone with a senior GSD has experienced difficulty in waking up their dog. I came downstairs this morning to take the girls out for their routine walk and I couldn't wake up my 13 yr old. I rubbed her neck, tried opening her eyes, shook her but she wouldn't wake up. Her breathing was very shallow as well. I honestly thought this was it for her. She is deaf having suffered two episodes of vestibular disorder. After about 3 minutes I closed her crate. A few seconds later she woke up and seemed perfectly normal. Any thoughts would be appreciated.