Fleas aren’t the only reasons dogs may be constantly scratching their itchy skin. Allergies can cause skin irritation as well. Just as with people, dogs are most commonly allergic to pollen, dust — and food, which accounts for around 15 percent of allergies in both dogs and cats.
If you suspect your dog has a food allergy — the usual symptom is severe itching, and some dogs also have gastrointestinal problems — visit a veterinarian. Your vet will examine your dog and “will probably recommend skin or blood tests, or a special elimination diet, to find out what’s causing the allergic reaction,” according to the ASPCA. (Years ago, through this process of eliminating foods, we discovered early in his life that our dearly departed Pit Bull, Larry, was allergic to chicken.)
The following cool and comprehensive infographic, created by Ghergich & Co. for Petco, provides lots of information about food allergies for both dogs and cats, as well as tips for how to start an elimination diet.
There’s nothing quite like the funky, earthy stench of a dog who’s just walked in the rain or gone swimming in a lake. We can’t grab a towel fast enough, am I right, pet parents?
That wet-dog odor is caused by microorganisms that live in dogs’ hair, according to Compound Interest, a website that takes a closer look at the chemical compounds people come across every day. The site and its infographics were created by Andy Brunning, a chemistry teacher in the U.K.
When water is added to the microorganisms in a dog’s hair, the foul-smelling organic compounds they produce are able to break free. As the water evaporates, the compounds increase in the air, as does the odor.
The chemical identities behind the wet-dog smell are complex. “There’s no one molecule that causes man’s best friend to morph into your nose’s worst enemy with the addition of water,” Brunning writes. “Instead there’s a cornucopia of molecules that contribute, which individually can have wildly varying smells, but combined make a soggy dog a smelly dog.”
Brunning notes that, “perhaps unsurprisingly,” few studies have been conducted on the source of wet-dog odor. A study several years ago identified several compounds whose concentrations increased when a dog’s hair was wet.
“These encompassed a whole range of independent odors, from ‘sulfurous,’ to ‘medicinal,’ to ‘fruity’ and ‘earthy,'” Brunning writes. “They also found that the concentration of some compounds increased more drastically than others.”
According to Brunning, additional research is necessary to authoritatively identify the chemicals causing the foul wet-dog odor.
“Until then, we at least know that it’s not the dogs themselves we should be blaming for smelling terrible, but rather the microorganisms they carry,” he concludes.
To help prevent wet-dog odor, pet parents can regularly brush and bathe their dogs to remove some of those microorganisms, advises Dr. Mary Fuller on VetStreet.com. If your dog smells funky even when he’s dry, Dr. Fuller says to take him to a veterinarian. A foul odor can be a symptom of a skin or ear infection, periodontal disease, digestive issues or other health problem.
“Whatever you do, avoid spraying perfumes or scents onto your dog’s coat to cover up the smell,” Dr. Fuller warns. “These products can be irritating and might just make the smell worse.”
Next up, I hope Brunning creates an infographic that explains why dogs’ paw pads smell like corn chips.
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