DEAR DR. FOX: Is Advantage II dangerous for cats? In a recent article, you mentioned that the combination of imidacloprid plus fipronil is dangerous. Is imidacloprid safe if it is not combined with fipronil?
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Two of my cats are feral, not domestic. They are second-generation Savannah cats, and raw meats are included in their diet. Bones, fat and skin -- nothing ever heated or cooked. Since their stomachs are different from domestic cats, I didn’t know if their other organs were, also. One of these cats is almost 5 years old and the other is 17 months.
Our third cat is a 15-year-old silver Bengal male. We have had both male and female Bengals for 30-plus years. All have been neutered or spayed. All are pets; we don’t breed our cats. -- K.R., West Palm Beach, Florida
DEAR K.R.: One of the ingredients in Advantage II is pyriproxyfen, which mimics a natural insect hormone to disrupt the growth of young insects and eggs. It can cause skin irritation and allergic reactions in cats, and may cause excessive salivation and gastrointestinal upset. The product’s other active ingredient, imidacloprid, is a neonicotinoid insecticide that may cause seizures in animals. It is one of a group of insecticides used on nonorganic crops that is killing pollinating bees and other beneficial insects.
No spot-on insecticides are risk-free. There is the possibility of one cat grooming another after treatment, and of family members (children, in particular) petting cats and dogs who have been treated and thus being exposed to these insecticides. These products should, in my opinion, be prohibited for companion animals.
There are safer alternatives to such insecticides. I advise you to follow the directions posted on my website: drfoxonehealth.com/post/preventing-fleas-ticks-and-mosquitoes. Rubbing food-grade diatomaceous earth into your cats’ fur will help kill any fleas that may get on them outdoors. Adding a daily pinch of brewer’s yeast (or 100 mg of crushed vitamin B complex) to their food may help repel fleas.
I advise against feeding raw poultry to companion animals because of the documented risk of the avian influenza virus now infecting cats and some people. Other raw meats run the risk of Salmonella and other bacterial contaminants.
I am opposed to the breeding and purchasing of Savannah cats and other wild-domestic cat hybrids for reasons spelled out in my review of this ethical issue. (See: drfoxonehealth.com/post/exotic-hybrid-cats-neither-propagate-nor-purchase.) They are indeed quite beautiful, but like wolf-dog hybrids, they are prone to developing behavioral problems. This leads many owners to get rid of them, which is a sad end for these human-creations.
The Jan. 18 Veterinary Record, the journal of the British Veterinary Association, contains an article by Josh Loeb entitled “Hybrid cat breeding should be banned.” This conclusion is based on the same reasons I have posted on my website.
AQUATIC MOLD KILLS DOGS IN FLORIDA
A rare fungal infection called pythiosis has killed at least four dogs in the past month in Sarasota and Manatee counties, Florida. The infection, caused by the aquatic mold Pythium insidiosum, which thrives in stagnant water, affects the skin and gastrointestinal tract, and it is difficult to treat. Veterinarian Morgan Pearl advises pet owners to prevent their animals from drinking from puddles, stormwater retention ponds, swamps or other standing water. (Full story: WWSB-TV, Sarasota, Florida; Feb. 12)
There is also a toxic species of blue-green algae to watch out for, plus contamination by nitrate and phosphate fertilizer runoff. Dogs should not be allowed near such contaminated waters. Livestock and wildlife are also at risk.
(Send all mail to animaldocfox@gmail.com or to Dr. Michael Fox in care of Andrews McMeel Syndication, 1130 Walnut St., Kansas City, MO 64106. The volume of mail received prohibits personal replies, but questions and comments of general interest will be discussed in future columns.
Visit Dr. Fox’s website at DrFoxOneHealth.com.)