I Have Heard Of A Wolf In Sheep's Clothing,

but this is the first time,

I have heard of a wolf in dogs clothing, and here he is above, but why? a zoo employee confirmed to Chinese publication Global Times that there was indeed a dog in the wolf’s enclosure, but added that the animal was only kept there temporarily. The Rottweiler was apparently a watchdog used to prevent strangers trespassing into the yard, “There indeed was a wolf,” a member of the staff said, adding that it had died of old age, and that the zoo didn’t have enough visitors to keep the zoo up and running well, 

the footage shows a visitor to the Xiangwushan Zoo in Xianning, Hubei province, Central China, visiting the wolf enclosure only to find a Rottweiler resting inside went viral on Chinese social media last week. The man who recorded the video, a certain Mr. Xu, can be heard saying “Woof! Are you a wolf?” to the dog, which doesn’t seem to concerned with the fact that it looks nothing like a wolf, 

I have to say it, this reminds me of the zoo in Egypt that allegedly could not afford a zebra so they painted a donkey with stripes! what was worse the director of International Gardens park, Mohamed Sultan, was asked for an explanation, Sultan flat-out denied rumours that the zebra at International Gardens zoo was fake, despite multiple veterinarians confirming that the animal in the photos was actually a donkey, even though the animal had usually-long ears, and also lacks the characteristic mane of its species, so that's alright then! for the full story have a look here.