4. Possums
Like rats, small possums are excellent swimmers, can hold their breath for long period, and are bendy enough to get around smaller pipes. Also like rats, keeping your pipes free of food scraps is key to dissuading possums from entering your plumbing system. To properly clean our your toilet’s pipes, mix equal parts of sugar, water, vinegar, and 5-10 drops of dish soap and flush it down your toilet. Boiling water can also be a good way to deep clean.
5. Snakes
Snakes are basically the perfect shape for fitting through long, thin pipes, and are fans of cool, dark, wet environments. While the majority of snakes that do appear in toilet bowls are relatively harmless, it’s likely not worth taking the risk of trying to remove them yourself. If you are unlucky enough to spy a snake in your toilet bowl, the safest move is to call pest control to have them deal with the problem. Once your toilet visitor is gone, you should again deep clean your pipes using the sugar, water, vinegar, and dish soap concoction to clear out any food residue in your pipes and ensure no more unwanted guests.
RESOURCES NATIONAL DAILY AND BBC