Quick Answer

Apple Slices (Seedless) is safe in strict moderation for your Cats. Cats can nibble on a tiny piece of seedless apple flesh without toxicity, though as obligate carnivores they gain little nutritional benefit. The fiber and water may slightly aid hydration and digestion, but the natural sugars are unnecessary and can cause mild gastrointestinal upset if overfed. Apple seeds remain dangerous due to amygdalin-derived cyanide, so only peeled, seedless flesh is acceptable. Overall, a sliver of apple is a safe but nutritionally empty treat that should not replace meat-based snacks.