All are non-toxic and will not poison your dog; however, there are a number of ways that ingestion of cat poop and litter can harm your dog. Cat litter is often scented to mask odors. Perfumes and dyes can cause allergic reactions in dogs, and if ingested, the resulting allergic reactions can make your dog quite ill. Because cat litter is absorbent, especially the clumping kind, it can absorb fluids in the gastrointestinal tract, resulting in constipation. Usually, this will resolve on its ...