What should I do with an abandoned dog?

[Masha Rizzi]

Does anyone have any tips on rehoming an older dog that was left behind?

I purchased a 3-plex a few months back and was waiting on all the tenant leases to end before starting the Renovations. One of them left a dog behind! Turns out the dog doesn't actually belong to any of them, but a past tenant who had passed away at some point. They all just took turns taking care of it.

So now there's an older black lab that is left behind... I've called some shelters and they're all full. I'm a big pet person so would really like to do the best thing for this dog and avoid dropping it off somewhere it would be put down or turned away.