Mystery Slug

[whitt]

Location: Salt Lake City, Utah, USA

My fiance found this little slug on one of our chairs covered in goop. I need to know if it is just a simple slug or if it's a parasitic worm that came from my cats(they are indoor only).

(please excuse the dirty cup)
imgur.com/a/HF7vIxv

[kevinkk]

After reading the description, I took a chance and looked. It seems to be a garden variety slug, the eyestalks give it away.