"Not my idea" as in I've seen this artwork done by many people before me. I chose to paint real animals instead of using another persons artwork for a reference and this isn't "critiquing" your just being an asshole, maybe you should just stay off the internet. You're not exactly the prime example of respect either.
At first, I couldn't find anything on Google or dA, so I thought they were originals (as they turned out to be). But then I began to doubt because your page is 3 years old and your art was uploaded on the day, and a lot of the comments on your page were blocked, so I just wanted to be safe. I rescind my previous comment and offer my apologies.