"Outward signs" refers to visible indications or manifestations of something, typically referring to physical or observable cues that provide clues or evidence about a person, situation, or condition. Full definition
Cats may not show outward signs of feline dental disease and they may even continue to eat even while suffering from severe dental issues. (second-opinion-doc.com)
Since prey animals show very few obvious outward signs of illness, at least initially, we see all of our small mammal patients once a year for comprehensive health screening. (mypetsvetmequon.com)
Other than bad breath, there are actually few outward signs of periodontal disease that can be easily detected at home. (pinnaclevets.com)