It’s certainly not a real Windstone, but I don’t know if they are trying to make a fake of Windstones or not. They may just be making a series of gargoyles on bases and not even know about the Windstones pig one.
If it had been just the pig, I’d suspect it, but the fact that it’s with a series of other animals that Windstone has never done makes me think it’s just coincidence.