Does anyone know of an animal anatomy site that displays images or 3D models of muscle structure? (similar to this one, just not with people: http://www.posemaniacs.com/ )

Reason I ask is that I've been having trouble finding a reference for a tattoo I'll be working on. While I may have confidence in my ability to draw this design, I think it would be nice to have a reference to fall back on. Especially when you consider the pose my client wants has never been drawn in a realistic fashion. In this case specifically, I'm looking for Big Cat references.

***As an added bonus for your help in this matter; whoever provides me with the best reference site for what I am looking for will receive a FREE PIECE of ARTWORK from me. Nothing too complex, probably a bust shot or feral drawing, that is fully colored and shaded. Your choice of digital or marker drawing.

Rules are simple:
1) Post a link to the website in the comments bellow [can be a picture bank/scientific site/3D model site - any site that has good references]
2) Type the date and time that you submitted the comment IN THE ACTUAL COMMENT
3) State clearly what kind of drawing you would like [bust vs. feral | digital vs. marker | relatively realistic vs. toony | etc.]
4) Post a link to the reference sheet of the character you would like to have drawn
5) Yes, this is Open to EVERYONE just post a quick shout-out linking back to this journal and put the link to the shout-out in the comment

This event-thing Will END Nov 12th at 8 pm my time (Approximately 7 days and 2 hrs away)
The Winner will be announced the Following Hour. Have Fun!

NOTE: This journal will also be posted on my Fur Affinity profile, so it isn't weasyl exclusive.
If you have any questions don't be afraid to ask.