Landlords that say "no pets allowed"...

This may ruffle feathers, but I can't stay quiet about it anymore, and I've tried. 

With an obvious housing shortage here, I can't understand how landlords can add that clause when looking for tennants, especially when looking for long term. Have the landlords been to an SPCA lately and seen what happens when people are forced to choose between having a place to live, or keeping a loved family member? Unless it's a crocodile who's constantly whipping it's tail and breaking drywall, I don't get it. It's called a damage deposit. Years ago we were in that spot, desperately wanting to stay in Rossland, still breaks my heart thinking of when we had to give up our black lab. Oh well, thx for listening, maybe one day that clause will be a distant memory...