In his book entitled "How to Start a Worm Bin" Henry Owens states not to use "dog or cat poop" that it is "toxic" and that "flea-killing meds can be especially toxic". I would think that the chemicals would have long since broken down, since flea meds need to be administered routinely or the dog is not protected. Would you speak to this?


People like Henry Owens are repeating stupid things they read from books and have no idea what is toxic. There is nothing wrong with using dog fecal material since, as you point out, any trace amount of chemical would have broken down in the months that the compost is decomposing. Even if there were a trace left in the feces, none of the flea preventatives are toxic to worms or lower worm fertility.

Updated on February 16, 2018

Original Article:

Best Ways to Recycle and Compost Dog Waste Free
By Dr Mark