This should be the perfect tutorial for you if you have trouble making perked ears, especially if you can't get them to look symmetrical/alike.
Concealing zipper on a sewn fur suit costume tutorial
Tutorial: Adding yarn to faux fur to change its appearance. Adding yarn to change the appearance of fur or add markings This is something fun I played around with and it turned out to be a very useful.
Just in case I ever do a cosplay with teeth. Cosplay Tutorial - Fake fang/teeth by JustBeFriend