There are several reasons why your DEWEL PRO flea collar may not be working effectively:
1. Incorrect Use: It's important to make sure you are using the collar correctly, according to the manufacturer's instructions. Ensure that the collar is fitted snugly around your pet's neck, but not too tight or too loose.
2. Wrong Size: Make sure you have purchased the correct size collar for your pet. Using a collar that is too big or too small can affect its effectiveness.
3. Acclimation Period: Sometimes it takes a few days for the collar's active ingredients to spread throughout your pet's fur, so it may take a while for the collar to start working effectively.
4. Water Exposure: If your pet swims or gets wet frequently, this can reduce the effectiveness of the collar. Be sure to remove the collar before your pet goes swimming or gets bathed, and allow it to fully dry before putting it back on.
5. Expired Collar: The DEWEL PRO flea collar is designed to be effective for up to 8 months. If you have been using the collar for longer than this period, it may no longer be effective at repelling fleas and ticks.
6. Heavy Infestation: If your pet has a heavy flea or tick infestation, a collar alone may not be enough to control the problem. You may need to use additional treatments, such as flea and tick shampoo or medication, to completely eliminate the infestation
7. Resistance: In rare cases, fleas and ticks may develop resistance to certain active ingredients in flea collars.
If you have been using the collar consistently and correctly, but still have a flea or tick problem, you may need to switch to a different type of flea treatment.
If you have tried all these solutions and your DEWEL PRO flea collar is still not working effectively, it's best to consult with your veterinarian to determine the best course of action.