Contrary to popular belief, fleas and ticks don't completely disappear in winter — but their activity varies greatly by season. Here's the calendar to follow for effective year-round protection.
| Period | Risk level | Recommended action |
|---|---|---|
| March - April | 🟠 Rising | Fit a collar before the seasonal peak |
| May - September | 🔴 High | Continuous protection essential |
| October - November | 🟠 Falling | Keep protection on, still active |
| December - February | 🟢 Low | Reduced but not zero risk depending on winter mildness |
Fitting a repellent collar as early as March, before the May activity peak, means protection is fully active before parasites become numerous — rather than reacting after the first bites are spotted.
A dog or cat that regularly goes outside, even in winter, remains exposed if temperatures are mild. A box of 4 collars of 6 months (24 months of continuous protection) avoids having to ask this question every season — protection stays active permanently.
If you travel to a warmer region (southern France, Spain) even during Belgian winter, flea and tick risk there often stays high all year round — protection should be maintained regardless of the season back in Belgium.
Yes, that's precisely the main benefit of long-lasting protection — once fitted, it stays continuously active with no seasonal intervention needed.
Fleas are less sensitive to outdoor cold than commonly thought, as they easily survive indoors in heated homes all year round, unlike ticks which depend more on outdoor climate.
Yes, in the case of an active infestation, a more intensive one-off treatment may be needed alongside the preventive collar — see our collar/spot-on/tablet comparison for more details.
Natural collars for dogs and cats — Free delivery to Belgium
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