Mange in Puppies and Kittens: What It Is and When to Worry
You brought home your new puppy or kitten, you’re completely obsessed with them, and then you notice a bald patch near their eye or a little scaly spot on their leg. Cue the spiral. Is it mange? Is it contagious? Did something go wrong?
Take a breath. If it turns out to be Demodex, it’s actually one of the more manageable skin conditions we deal with in young pets — and in many cases, it resolves on its own.
Every Puppy and Kitten Already Has These Mites
This is the part that surprises most people. Demodex mites are passed from mom to babies during the first days of life, through normal contact. By the time your puppy or kitten came home with you, they already had a population of Demodex mites living in their hair follicles. This is completely normal.
In a healthy animal, the immune system keeps mite numbers low enough that they cause no issues at all. Problems only arise when that balance tips.
Why Young Pets?
Young pets are still developing their immune systems. Think of it like a thermostat that hasn’t quite been calibrated yet — the body hasn’t fully learned how to regulate everything. This is why Demodex flares are relatively common in puppies and kittens, especially between a few months and two years of age.
Other contributing factors can include stress (like the transition of being rehomed), illness, poor nutrition, or being generally rundown. Certain breeds — including bulldogs, French bulldogs, pugs, shar-peis, and a handful of others — seem to have a genetic predisposition to Demodex issues as well.
What Does It Look Like in Young Pets?
In puppies, Demodex most commonly shows up as:
- Small, circular patches of hair loss — often around the eyes, muzzle, or front legs
- Mild redness or scaliness in those areas
- Sometimes a mild odor if a secondary skin infection has developed
There are two main forms. Localized Demodex involves just a few small patches — usually fewer than five — in isolated areas. This is the milder, far more common version in puppies and often goes away on its own as the immune system matures. Generalized Demodex covers larger areas of the body or involves many lesions, and requires active treatment.
In kittens, Demodex is less common overall, but does happen. Demodex gatoi can spread between cats through close contact (unlike dog Demodex, which is not contagious to other dogs or people). Demodex cati behaves more like the localized version seen in dogs and is typically tied to immune function.
Is It Contagious to Me or My Other Pets?
Dog Demodex mites are species-specific — they can’t survive on people or cats. So no, you are not going to catch mange from your puppy. Demodex gatoi in cats can spread between cats who live together and groom each other, which is worth knowing if you have a multi-cat household.
When Does It Need Treatment?
Localized Demodex in puppies is often monitored first rather than treated immediately. If the spots are stable or slowly improving over six to eight weeks, we may simply keep an eye on things. If they’re spreading, multiplying, or showing signs of infection, we move to active treatment.
Generalized Demodex, recurring cases, and cases in kittens with underlying illness all warrant treatment. We have safe, effective options that work well — including oral medications your pet takes monthly that most owners find much easier to manage than older treatment methods.
We’ll also think about whether anything underlying contributed, especially if a young pet has a more severe or persistent case.
One Thing Not To Do
Please don’t start your puppy on steroids or allergy medications based on a guess — Demodex and allergies can look alike, but steroids suppress the immune system and can make a Demodex situation significantly worse. A proper diagnosis before treatment matters here.
The Bottom Line
Demodex in young pets is common, often manageable, and not a sign that you did anything wrong. It doesn’t mean your puppy or kitten is unhealthy or that something is terribly amiss. But it does need a proper look so we can figure out which form we’re dealing with and whether it needs treatment or just monitoring.
Call Us or Schedule an Appointment Today — we’ll do a quick skin scraping, take a look under the microscope, and make a plan that makes sense for your specific pet.
Prairie Animal Hospital proudly serves Peoria, Brimfield, Dunlap, and the surrounding communities. We are Fear Free and Cat Friendly Certified.