Owners sometimes report side observations like less dandruff, fewer hairballs in cats, or a pet that seems more willing to play. These can be real, but they are also easy to over-attribute because many things change at once (season, grooming, diet, parasite prevention). The most reliable interpretation is to tie any “benefit” to a specific, repeatable observation signal rather than a general impression.
A simple method is the “two-signal rule.” Choose one skin signal (itch episodes, ear debris, paw odor) and one coat signal (brushing fallout, flake amount, shine). If both trend in a better direction over 4–8 weeks without stomach upset, the oil is likely contributing. If only the coat changes while itch stays intense, that’s a clue to widen the plan rather than assuming the supplement failed.