Now this is strange. Below, I typed in the code to display your wolf. Underneath that, I directly copy & pasted the code in your post. One worked, one did not, but I can't see why! The code is indeed {Wolf(IDNUMBER)} - have you tried typing it out fresh instead of copy & pasting the characters?
I believe you have to manually type the code into the 'Code view' Section of a post! (I don't think it can be pasted there, unfortunately...)
I typed your wolf's code here for an example ('W' in wolf was capitalized + written it in code view) << (sometimes just the code appears when you go back to normal, don't worry tho because it will show the image anyways)
Sometimes if you type a wolf code, it appends span tags that appear to mess up its function in the code view. It will show as "{Wolf(<span>383574)}</span>" -- if you don't remove the span tags in code view prior to posting, it won't work (at least for me!) I have to remove it manually every single time for it to show correctly, but that doesn't seem to be universal. :P