Knowing when to replace a flea collar requires the exact product label, not a universal calendar rule. Duration claims, activation, water exposure, storage, species, fit, and instructions differ. Record the date a collar is fitted and keep its box and leaflet.

Start with the stated duration

Find the label's maximum use period and how it is calculated. Do not extend use because the collar still looks intact. Equally, do not replace it early on a guess if the label or veterinarian gives a different schedule.

Confirm the correct species and size

A replacement must still suit the animal's species, age, weight, and health. Never substitute a dog-only collar for a cat product or cut a larger product down unless the instructions explicitly permit it.

Record fitting and opening dates

Write down when the package was opened and the collar fitted. If storage after opening affects use, follow that guidance. Keep unused collars sealed and stored exactly as directed.

Inspect for physical damage

Review the fastener, material, and fit. A cracked, chewed, stretched, or unreliable collar needs prompt assessment according to its label. Prevent pets from licking or chewing it.

Check water-exposure guidance

Bathing, swimming, rain, and shampoo can have product-specific effects. “Waterproof” does not mean every exposure is irrelevant. Follow the exact restrictions and do not apply extra product.

Review the skin underneath

Check for redness, hair loss, swelling, moisture, sores, or tenderness. Follow label removal and first-aid instructions and seek veterinary advice for reactions or unusual symptoms.

Review the exact product

Before using the next collar from the DEWEL two-pack flea and tick collar set, verify the current label for species, fit, duration, ingredients, water, contact, storage, and disposal guidance.

Do not treat parasite sightings as a simple timer

Finding fleas or ticks can involve environment, fitting, exposure, local parasite pressure, or another cause. Do not immediately combine products. Ask a veterinarian about an integrated control plan.

Dispose of old collars safely

Follow label and local disposal instructions. Keep removed collars away from children, wildlife, water, and other animals. Do not reuse a collar on another pet.

Keep a reminder

Use a calendar alert before the stated end date so there is time to obtain a suitable replacement and review the animal's current health and weight.

Frequently asked questions

Can I keep using it if there is no odour?

Odour is not a reliable measure of remaining use. Follow the label duration.

Should I remove it every night?

Do not create an on-and-off routine unless the label or veterinarian instructs it.

Can two collars overlap?

Do not overlap parasite treatments without veterinary and label guidance.

Let the label and condition decide

Track the start date, inspect fit and skin, account for damage and water guidance, and replace only according to the exact instructions or veterinary advice.