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How Lungworm Spreads: What St Margarets Dog Owners Need to Know

Date: 19 Mar 2026
By: admin

Lungworm is a growing concern for dogs in southwest London, and St Margarets is no exception. With its thriving fox population, leafy gardens, and riverside paths, the area provides the perfect conditions for this dangerous parasite to spread. Many pet owners remain unaware of just how easily their dogs can become infected, making education and year-round prevention essential.

In this article, we’ll explore exactly how lungworm spreads, why St Margarets is particularly at risk, and what practical steps you can take to keep your dog safe.

How Lungworm Spreads

Lungworm is carried by foxes, which shed the parasite in their faeces. This contamination isn’t limited to the foxes’ own territory,  their droppings can end up in gardens, parks, and even on pavements. Once in the environment, the parasite finds its way into slugs and snails, which act as intermediate carriers. Dogs become infected primarily when they eat, sniff, or lick these slugs and snails, or come into contact with contaminated soil or water.

Even dogs who don’t deliberately hunt slugs can be at risk. A curious sniff of a damp patch in your garden, drinking from an outdoor water bowl, or licking toys left outside can be enough for infection to occur.

Why St Margarets Is a Hotspot

St Margarets has seen a rise in the local fox population in recent years, particularly along riverside areas, Moormead Park, Marble Hill, and residential gardens. These foxes often visit gardens at night, leaving faeces that can contaminate soil and attract slugs. The combination of damp, shaded gardens, riverbanks, and public green spaces creates ideal conditions for lungworm to thrive.

This means that even well-behaved dogs who spend most of their time on leads or in their gardens are exposed. Unlike other parasites, lungworm can silently establish itself before symptoms appear, making prevention through regular worming absolutely critical.

Symptoms of Lungworm in Dogs to Watch For

Lungworm can be life-threatening if untreated. Early signs are often subtle, and may include:

  • Persistent coughing or difficulty breathing
    Fatigue or reluctance to exercise
  • Unexplained bleeding or bruising
  • Vomiting or diarrhoea

In severe cases, seizures can occur. If you notice any unusual behaviour or symptoms, it’s essential to contact your vet promptly for testing and treatment.

The Importance of Regular Worming

Not all worming products protect against lungworm. Dogs in St Margarets require a monthly, vet-prescribed preventative. This is because:

  • Lungworm can establish itself quickly and silently
  • Missing even a single dose leaves dangerous gaps in protection
  • High local fox activity means pets are at continual risk
  • Preventatives work best when used consistently

Keeping your dog on the correct worming schedule is the single most effective way to prevent lungworm and avoid serious illness.

Practical Steps for Pet Owners

While regular worming is the most important safeguard, there are other ways to reduce risk:

  • Avoid letting dogs drink from puddles or outdoor water bowls
  • Pick up any fox faeces in your garden promptly (using gloves)
  • Bring toys and bowls inside overnight
  • Supervise dogs when walking in areas known to be frequented by foxes

By combining good hygiene, careful supervision, and a consistent worming schedule, you can significantly reduce the risk of lungworm infection.

Protect your Pet at The Vet in St Margarets

Lungworm is a serious threat to dogs in St Margarets, but it is preventable. Understanding how it spreads, recognising the risks posed by local foxes and slugs, and keeping up with monthly vet-recommended worming can keep your dog safe and healthy. Being proactive is the best way to enjoy worry-free walks along the Thames, through Moormead Park, or in your own garden.

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