Baking soda can cause chemical changes in your fuzzies stomach that lead to a tummy ache and pH imbalances. It is important to remember that ferrets don't spit when their teeth are brushed, so the paste has to be 'edible'. I find that most ferrets like the malt flavored feline toothpaste available at many vets and pet stores. The poultry flavor is less popular but still an option. -Dr. Karen [log in to unmask] [Posted in FML issue 1832]