I've seen a lot of those on CL and eBay. I can understand using a stock photo if an item is still in original packaging and needs assembly. But never an animal. If the seller has chicks- take a photo of the chicks. If it's fertile eggs for sale - show the flock.
The worst was when a friend called me and asked if I was selling my blue Orpington Jewel. She found Jewel's pic on Craigslist. Yep. Someone copied my CL photo to sell their chicks. How rude! When I asked, they took it down. I'm guessing the person was selling extra hatchery chicks because there were many breeds listed.
I will probably use a watermark, but I added text for now.
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