What pests can affect dogs and cats?
TL;DR — Quick Answer
Common pests that affect pets include fleas, ticks, mites and biting insects. These pests can cause itching, irritation, discomfort and potential health concerns. Regular pet checks, good hygiene, garden maintenance and professional pest control treatments can help reduce the risk of pests affecting animals and entering your home.
Which Pests in Sydney Harm Dogs, Cats and Other Pets?
Common household pests can cause mild irritation or life‑threatening illness for your pets. A 2025 NSW Department of Primary Industries report shows 62% of pet owners in Greater Sydney have dealt with pest‑related health issues in their animals.
For a full inspection and tailored protection plan, contact Sydney’s best pest control team.
How Dangerous Are Ticks for Pets in Sydney?
Remove ticks immediately when found. They transmit Lyme disease to both animals and humans, and can cause tick paralysis if attached for too long.
NSW Health data confirms 1 in 4 tick‑affected pets develop paralysis symptoms without prompt removal. Early signs include wobbliness, loss of appetite and breathing trouble — see a vet straight away.
- Attach for 24–72 hours before releasing dangerous toxins
- Common in grassy yards, bushland and coastal suburbs
- Check paws, ears and belly daily in warm months
If you spot ticks around your home, call us on 1800 819 189 for safe removal and prevention.
What Risks Do Fleas Pose to Cats and Dogs?
Fleas live on blood and cause intense itching and allergic reactions. Heavy infestations lead to anaemia — signs include lethargy, rapid breathing and weakness — and can be fatal for puppies, kittens or small pets.
According to the Australian Veterinary Association, 40% of tapeworm cases in pets come from swallowing infected fleas. Symptoms include weight loss, vomiting and changes in appetite.
- Adults lay up to 50 eggs every day
- Eggs live in carpets, bedding and floor cracks
- Treat your pet and your home at the same time
Are Spider Bites Dangerous for Pets in Sydney?
Most spider bites are mild, but Sydney has highly venomous species like Redbacks and Funnel‑webs. Watch for redness, swelling, pain, tremors, vomiting or collapse — seek urgent vet care if you see these signs.
The University of Sydney reports 18% of pet emergency cases linked to spiders involve Funnel‑web or Redback bites, mostly in summer and autumn.
- Redback: severe pain, sweating and restlessness
- Funnel‑web: rapid breathing, shaking and collapse
- Keep yards clear of debris where spiders hide
What Happens If a Pet Is Stung by Bees or Wasps?
Reactions range from mild swelling to fatal anaphylaxis. Watch for neck/face swelling, hives, watery eyes, vomiting, breathing trouble or seizures — see a vet immediately for any of these.
RSPCA Australia notes 12% of sting incidents involve severe allergic reactions, often within 10–30 minutes of the sting.
- Remove stinger gently if left behind
- Keep your pet calm and cool
- Call a vet for swelling near the throat or face
Can Bed Bugs Make Pets Sick?
Bed bugs feed on blood but are not known to spread disease to pets. They cause itching and red bite marks, and often hide in pet bedding, rugs and soft furnishings.
Department of Health figures show bed bug reports in NSW rose 38% between 2023 and 2025, often spreading through shared laundry or travel.
- Check bedding and sleeping areas daily
- Wash bedding on high heat if you suspect them
- Professional heat treatment is the most effective fix
Why Are Mosquitoes a Big Threat to Pets in Sydney?
Mosquitoes spread heartworm, a life‑threatening parasite living in the heart and lungs. Symptoms include coughing, lethargy, exercise intolerance and collapse.
Heartworm Australia states 1 in 15 unprotected dogs in NSW test positive each year — monthly medication is 99% effective at stopping infection.
- Breed in still water: bowls, buckets, plant saucers
- Most active at dawn and dusk
- Ask your vet about year‑round prevention
Pest vs Pet Risk Comparison Table
| Pest | Main Risk | How Fast It Can Harm | Prevention Steps |
|---|---|---|---|
|
Tick |
Paralysis, Lyme disease | 1–3 days | Daily checks, yard treatment |
Flea |
Anaemia, tapeworms | 1–4 weeks | Pet meds + home spraying |
|
Spider |
Venomous bite | Minutes to hours | Clear clutter, seal gaps |
Bee/Wasp |
Anaphylaxis | 10–30 minutes | Remove nests, watch outdoors |
Bed Bug |
Itching, irritation | Days to weeks | Heat wash, professional treatment |
Mosquito |
Heartworm | 6+ months | Vet prevention + remove stagnant water |
Frequently Asked Questions
Q: Can my pet get sick from a common house spider?
A: Most bites are mild, but Redbacks and Funnel‑webs found in Sydney can cause serious illness — always see a vet if you suspect a bite.
Q: How often should I check my pet for ticks?
A: Daily in spring and summer — especially after walks or playing in grass or bushland.
Q: Do flea treatments work on their own?
A: No — only 5% of fleas live on your pet; the rest are in your home. You must treat both your pet and your house.
Q: Is heartworm common in Sydney?
A: Yes — mosquitoes carry it all year round. Monthly vet‑prescribed prevention is the best protection.
Q: Will bed bugs go away without professional help?
A: Very rarely — their eggs survive most store‑bought sprays. Professional heat or chemical treatment is almost always needed.
📚 Related Guides
- Residential Pest Control Sydney
- Flea Control Sydney
- Tick Control Sydney
- Rodent Control Sydney
- Cockroach Control Sydney
- How to Keep Fleas Under Control
- Are You Battling Ticks?
- Protecting Your Children From Bug Bites
- Summer Pest Control Tips
- Natural Pest Control For Your Home
- Pest Control vs Animal Control
Need Help Protecting Your Pets From Pests?
Sydney pet owners should be aware of pests such as fleas, ticks and biting insects that can affect animal health and comfort. Pets may bring pests indoors after outdoor activities, allowing infestations to spread through carpets, bedding and living areas. Preventative pet care, garden maintenance and professional pest management can help protect pets and homes.
We know Sydney pests and how to keep your furry family safe — safely, legally and effectively.