Here's a paragraph that is separate from the Ivermectin warning... it addresses Spinosad, the main ingredient in Comfortis...... entire article (complete with references to Ivermectin) can be found here: http://www.veterinarypartner.com/Content.plx?P=A&A=2768&S=1&SourceID=52 Peggy Comfortis® tablets are beef flavored but contain pork protein. They should not be a problem for dogs with beef allergy but could be a problem for a dog with a pork allergy, rare as that might be. Spinosad is best not used in pregnant or nursing females. During initial testing, spinosad was given to pregnant and nursing mother dogs at doses slightly above the recommended dose. Problems observed included loss of litter during pregnancy, poor weight gain of puppies, and vomiting. Problems did not occur after puppies reached age 14 weeks. Spinosad should not be used in puppies under age 14 weeks. Initial testing included use in dogs with pre-existing seizure disorders with doses higher what are recommended. Some of these dogs broke with seizures. It is unknown whether or not this was caused by the product. For this reason, dogs with seizure disorders should probably use a different flea control product. SPINOSAD IS NOT APPROVED OR RECOMMENDED FOR USE IN CATS. ----- Original Message ----- From: "Peggy" <pmick12@xxxxxxxxxxx> To: <almanya@xxxxxxxxxxxxx> Cc: <showgsd-l@xxxxxxxxxxxxx> Sent: Monday, July 14, 2008 11:39 PM Subject: Re: [ SHOWGSD-L ] Re: Flea Problems, > Or on bitches you plan to breed, or young puppies, and other > warnings...not just the Ivermectin..... > Peggy > > ----- Original Message ----- > From: <almanya@xxxxxxxxxxxxx> > > > >>I use Comfortis on my dogs and it is great, the only warning I know about >>is you can't use it and use high doses of Ivermectin at the same time. >> >> AMY SAFDIR > ============================================================================ POST is Copyrighted 2007. All material remains the property of the original author and of GSD Communication, Inc. NO REPRODUCTIONS or FORWARDS of any kind are permitted without prior permission of the original author AND of the Showgsd-l Management. ALL RIGHTS RESERVED. ALL PERSONS ARE ON NOTICE THAT THE FORWARDING, REPRODUCTION OR USE IN ANY MANNER OF ANY MATERIAL WHICH APPEARS ON SHOWGSD-L WITHOUT THE EXPRESS PERMISSION OF ALL PARTIES TO THE POST AND THE LIST MANAGEMENT IS EXPRESSLY FORBIDDEN, AND IS A VIOLATION OF LAW. VIOLATORS OF THIS PROHIBITION WILL BE PROSECUTED. For assistance, please contact the List Management at admin@xxxxxxxxxxxx VISIT OUR WEBSITE - www.showgsd.org ============================================================================