Well the only way I can see how to fix it is if you backed up the original fur textures, and you just replace the new ones with the old ones again.
Here is the download for the Default Fur Textures (Belongs in Local Disk (C:) >> FeralHeart\\Media\\Textures): Default FeralHeart Fur Textures (http://www.mediafire.com/download/6ny3jdtuw3jb2ja/Default+Fur.zip)
All you have to do is to unzip the downloaded file, copy the files in the folder and paste them in your textures folder.