In reply to arch:
This reminds me that there was a bonnie wee brown dog tied up to the trolley shelter in the car park at my local Sainsburys when I went in there yesterday afternoon. I did think it wasn't a particularly pleasant place for the pooch to have to wait but assumed that the owner didn't intend to be long. I did a fairly large shop which must have taken at least 45 minutes, possibly nearer an hour, and when I finally headed back to the car the dog was still there.
Thinking back on it now I should probably have popped back in to the store and had a word with customer services. Unfortunately, having survived the checkout process and with my head in "let's get out of here" mode, it never occurred to me at the time.
The dog didn't seem to be in distress but all the same I don't think leaving one tied up like that for such a length of time, in a subterranean car park, is a great idea.