Guide
American Bully Skin Problems
Every common cause, not just allergy: mange, folds, yeast, hot spots and dilution alopecia. How to tell them apart before you spend money.
Skin trouble in an American Bully has five common causes and they need completely different treatments, which is why guessing is expensive. Allergy is the most common, but demodectic mange, skin fold infection, yeast overgrowth and colour dilution alopecia all present as an unhappy coat and all get mistaken for each other.
Telling them apart
| What you see | Likely cause | What confirms it |
|---|---|---|
| Itching, foot chewing, face rubbing, recurring ear infections | Allergy | Elimination diet or skin testing |
| Patchy hair loss around the face or forelegs in a young dog, not very itchy | Demodectic mange | Skin scrape at the vet |
| Redness and smell in the folds, the groin, the armpits | Skin fold dermatitis or yeast | Cytology, a slide under a microscope |
| A sudden wet, angry patch that appeared overnight | Hot spot | Appearance. Usually secondary to something else |
| Thinning, brittle hair only in the diluted areas of a blue or lilac dog | Colour dilution alopecia | Coat colour plus biopsy if needed |
| Circular scaly patches, may spread to people | Ringworm, a fungus | Culture or a UV lamp examination |
The single most useful thing here: itch level separates the two big ones. An allergic dog is desperately itchy. A dog with demodex often isn’t itchy at all, it’s simply losing hair. If somebody tells you a bald patch on a four-month-old puppy is an allergy and the puppy isn’t scratching, ask for a skin scrape.
Demodectic mange, because it frightens people unnecessarily
Demodex is a mite that lives on nearly every dog on earth, including yours and mine. It causes trouble only when a young dog’s immune system hasn’t caught up with it, which is why it turns up between three and eighteen months and then resolves.
It’s not contagious to other dogs or to people. It isn’t a sign of a dirty kennel. Localised demodex, a patch or two around the face, frequently clears without treatment. Generalised demodex covering large areas needs veterinary treatment and is a bigger deal.
I mention it at this length because it’s common in this breed, it looks alarming, and owners are regularly told it means the puppy was badly bred. It usually means the puppy is four months old.
Folds, which are a build problem rather than a disease
The more wrinkle a dog carries, the more warm damp skin sits against skin, and that’s a place bacteria and yeast do well. It shows as redness, a distinctive smell and sometimes raw skin in the crease.
Management is mechanical: wipe the folds, dry them properly, and do it as routine rather than when there’s already a problem. A dog with significant facial wrinkle needs this a few times a week for life.
This is one of the reasons I’m blunt on the exotic page that a heavier, more compressed dog carries more of this. It’s a direct consequence of the build, and the build is what the market pays a premium for.
When to stop home-treating and go
- Any raw, weeping or bleeding skin
- A smell, which almost always means secondary infection
- Hair loss that’s spreading rather than static
- Anything that hasn’t improved in two weeks of doing the obvious things
- A dog that has stopped sleeping properly because of the itch
Repeated courses of steroids are a sign the underlying cause has never been identified. They work, which is the trap: the dog gets better each time and nobody ever finds out why it keeps happening.
I don’t screen or certify the parents and I won’t claim I do. Every puppy is examined by Bell Rock Veterinary Clinic before it leaves, (928) 284-2840, and travels with a written health record.
Allergies in depth · Which coats carry dilution alopecia risk · The full health overview
Every puppy leaves with a written health record
Examined by Bell Rock Veterinary Clinic before it travels, with every date written down.