The only way you can see Dugite’s stripes is if you put false ones on her. She is actually a stripy tabby.

“…She can only disguise, and only for those eager to believe whatever comes easiest. She cannot turn cream into butter, but she can make a lion look like a manticore to eyes that want to see a manticore. Just like she put a false horn on a real unicorn so they can see the unicorn. I know you. If I were blind, I would know what you are…” Schmendrick, The Last Unicorn, Peter S Beagle