Unfortunately, not only is this inaccurate but in the case of Garlic it can actually be harmful. A scientific study was done using Brewers Yeast and submitted for publication in a very reputable Veterinary Journal… the link is http://www.ncbi.nlm.nih.gov/pubmed/6885593. The results of the study showed that there was no benefit to using Brewers Yeast to control fleas. Interestingly, it should also be noted that some of the growth medium used to actually grow Fleas in a laboratory setting contains Brewers Yeast.
Garlic not only has no proven efficacy against Fleas but can actually be Toxic. Colorado State University School of Veterinary Medicine (a World respected Veterinary Teaching facility) released an article on just this topic.
We have Bravecto available in stock. It is an amazing and new oral pill that controls fleas and ticks for 3 months for one pill. For more information please do not hesitate to call the office.