Itching is one of the commonest reasons dogs are taken to a vet, and one of the most frustrating problems to manage, because owners try four things at once and then cannot tell which one helped. A structured approach is worth considerably more than a new shampoo.
Start with the boring explanation
Parasites are among the commonest causes of itching, and flea allergy is the classic case: a dog with a hypersensitivity can be extremely itchy from a very small number of fleas, and you will not necessarily find any on the coat.
Before anything else, make sure every animal in the household is on an effective, correctly dosed parasite treatment, applied on schedule rather than when someone remembers, and that the environment has been dealt with. The eggs and larvae are in the carpets, the sofa and the car, not on the dog.
Mites are the other parasitic cause, and they need a veterinary diagnosis rather than a guess: some are highly contagious, some are itchy out of all proportion to what is visible, and they are treated differently.
If the itching stopped when you last treated for parasites and came back a few weeks later, you have the answer and a schedule problem, not an allergy.
The three common patterns
Environmental allergy. The most common allergic cause. Pollens, house dust mites, moulds and grasses. Typically begins between one and three years old, often seasonal at first and becoming year-round as more sensitivities develop. The classic picture is paws, face, ears, armpits and belly rather than the back.
Flea allergy. Concentrated over the rump, the base of the tail and the back of the legs.
Food allergy. Real, and considerably less common than it is blamed for. It causes itching that is not seasonal, often involves the ears and the rear end, and frequently comes with digestive signs. It is diagnosed with a properly run elimination diet, not by reading an ingredient list.
Why random food changes waste months
Switching between three commercial foods in six weeks tells you nothing, because most of them share proteins, because the change takes weeks to show and because the dog's environment is changing at the same time.
A real elimination trial uses a diet your dog has genuinely never eaten, or a hydrolysed veterinary diet, for eight to twelve weeks with absolutely nothing else: no treats, no chews, no flavoured medication, no food from children. Then the original diet is reintroduced to see whether the signs return, which is the part most owners skip and the part that actually proves it.
It is demanding, and it is the only version that produces an answer.
Keep a record
Two months of simple notes change a consultation completely. Each week: how itchy, on a scale of one to ten; where on the body; whether the ears are involved; whether the paws are being licked; the weather and the walking ground; any change in food, treats or products; and whether parasite treatment was given and when.
Photographs of the affected areas help, because skin looks different a fortnight later. So does a note of what improved and for how long.
What a vet will look at
Expect skin scrapes and tape samples to look for parasites and for yeast and bacterial overgrowth, which are secondary problems that develop in inflamed skin and which make everything worse. Ear examination, because ears and skin are the same organ from the dog's point of view. Sometimes blood tests to exclude hormonal causes, particularly in a middle-aged dog with a dull coat, weight gain and lethargy.
Modern treatment for allergic itch has improved a great deal. There are options that target the itch directly rather than relying on long-term steroids, and for confirmed environmental allergy, immunotherapy tailored to the dog is available. Ask what the plan is for the next six months rather than only for this week.
What you can do alongside
- Rinse the coat and paws with plain water after walks in pollen season, which physically removes allergens
- Dry thoroughly, particularly the feet and any folds. Damp skin in a heated flat is where yeast thrives
- Wash bedding weekly at a high temperature and vacuum frequently for dust mite sensitivity
- Use only shampoos your vet recommends, and stop using anything scented
- Keep the coat properly groomed: mats trap moisture and hide infection
- Do not stop a prescribed treatment the moment the dog improves, which is the commonest reason these cases relapse
The Luxembourg calendar
Tree pollen in spring, grasses from late spring into summer, moulds in autumn leaf litter, and house dust mites all year in heated flats. A dog that itches every year between April and July, with clear autumn and winter, is pointing you at the environment rather than at dinner.
Note also that seasonal walking ground matters: a dog that reacts to grasses will be worse after an hour in a meadow than after the same hour on pavements, and that is something a walker can record and adapt.
When to stop experimenting
Go to the vet rather than trying one more product if the skin is broken, smelly, crusted or losing hair; if the ears are involved; if the dog is licking a single spot obsessively; if it is keeping itself or you awake; or if you have been managing it alone for more than a few weeks.
Itching that has been going on for months is rarely one problem by then. It is usually an original cause plus a secondary infection plus a habit, and untangling that needs a diagnosis rather than another bottle.
General information for dog owners in Luxembourg, not veterinary or legal advice. For your own dog, ask your vet, a qualified behaviourist or your commune. How this journal is written and checked.
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