They do love salt. We were hiking in Glacier and had to first shoo a deer away so we could put the tent up at our backcountry site. Then were awakened in the middle of the night by two mountain goats licking the shoulder straps on our packs leaning up against the vestibule. We brought them inside (the packs, not the goats). The sound of their tongues a foot from our heads on that material was very strange.