From 4-Legger® - Makers of 4-Legger USDA Certified Organic Dog Shampoo

Ingredient Name
Natural or Synthetic?
How Safe Is It?
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Kathone CG

(also written as 

Kathon CG)

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A mixture of methylchloroisothiazolinone and methylisothiazolinone (2 toxic ingredients), this ingredient has links to skin allergies and irritation, developmental and reproductive toxicity, and is ecotoxic. 

A peer review journal article also identifes these ingredients as being mutagenic.

Ketoconazole
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There is very strong evidience this fungicide, one of the most commonly used in medicated dog shampoo, is an endocrine system disruptor with limited evidence of reproductive toxicity. 

We recommend a tea tree shampoo for yeast. A natural alternative to these toxic ingredients.