The interesting thing about such a Hadith is the fact that snakes cannot hear. It is bad enough to assume that any animal would understand you giving a verbal warning, but to assume that an animal that is deaf will understand you is ridiculous. It is the equivalent of writing a note for a bat, and leaving it on your door so that he may read it later. It is a well in which dead dogs, menstrual clothes and excrement of people are thrown. The issue here is not hygiene, but rather a lack of scientific understanding of bacteria, viruses, and germs that can be present in water.
Water contaminated with dead dogs or menstrual fluids can be equally dangerous.
Conclusion Muslims cite alleged scientific miracles in the Qur'an and Hadiths to try and prove a divine origin of their faith. In this short study of Islamic science, these claims have been debunked. Clearly there was no supernatural force giving Muhammad scientific information. While the Muslims argued that advanced scientific knowledge in the Qur'an is a sign of divine origin, the rational thinker points out that the numerous and obvious scientific errors point to a wholly human origin.