Toronto Animal Services doesn't usually see a lot of Great Danes passing through its doors, especially local stray ones (as opposed to rescues from other jurisdictions) so it's somewhat surprising that there were two in at the same time. Shadow is the second Dane but unlike Beth, he is young, healthy and full of beans and up for adoption.
Shadow is only eight months old so he's got a whole lot more growing to do as Danes don't usually reach their full weight until they're around two years old. Having said that, I don't think Shadow is going to be a giant, well, not a giant as far as Danes are concerned meaning two hundred pounds or more. I wouldn't be surprised, though, if Shadow got up to 140 pounds eventually.
Some Danes can be a little stand-offish with strangers but not Shadow. He's feels more comfortable around calm people and then he's generously giving out hugs and kisses.
The person who surrendered Shadow said he was a Great Dane Rottweiler mix. I don't really see any Rottie in Shadow at all.
The best way to check on the adoption status of this dog (and other dogs and cats and other small domestic animals) is to visit Toronto Animal Services adoption website or call 416 338 6668 for the Toronto Animal Services South shelter. If the dog is no longer on the TAS adoption website, it's probably because it's been adopted already.