Definitely not tapirs. More like a cross between hyenas, warthogs and a ballerina.
Sometimes alien1452's sense of figure proportion gets really wonky. A friend used to have that happen when she painted - each portion was perfect but did not match the rest of the figure's parts. She was legally blind (20/400) and had to be within a couple of inches of the painting to clearly see what she was doing. Once she could afford the proper contacts (in the late '80s) and could see her work from father away her paintings immediately improved.
Those animals in the backgound are definitely warthog/boars, look at the body shape (although way too muscular) and curly tail.
Oh, if anything this should fall into the "Perfect Ass" pool or whatever its called, but not be tagged as huge cause it flawlessly shaped. I have a PhD in T&A and I can really appresiate how much detail the artist put into picture, he even got how the ass would look when one leg is up like that, its simply stunning.