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  Medication reactions and seizures are symptoms of liver shunt.  She needs a bile acids test to check liver function as soon as possible.  Most Yorkies can handle heartworm meds fairly well.  Although I agree that they are very harsh, I think the disease is too serious to try and prevent with any type of questionable homeopathic product.  We use Interceptor also but do as little flea med as possible.  
				__________________  Crystal  , Ellie May (RIP)  , Rylee Finnegan  , and Gracie Boo🐶  |