Autumn in New Zealand — March through May — brings cooler mornings, shorter evenings, and a whole new set of challenges and opportunities for pet owners. From parasite season peaks to dietary adjustments and seasonal hazards in the garden, here is everything you need to keep your dogs and cats healthy as the leaves begin to turn.
What Autumn Means for NZ Pets
New Zealand’s autumn is mild compared to northern hemisphere standards, but the transition from summer still brings meaningful changes for your pets. Daytime temperatures across Auckland, Wellington, and Christchurch drop noticeably from March into May, and rainfall increases across much of the country. Humidity remains high in the North Island, while the South Island cools quickly after Easter.
For pets, these changes affect everything from energy levels and coat condition to parasite load and appetite. A proactive approach to seasonal care means fewer vet visits and a happier, healthier animal all year round.
NZ Autumn At a Glance (March–May)
Temperatures: 12–22°C across most of NZ
Rainfall: Increasing, especially in the North Island
Daylight: Decreasing after the March equinox
Flea & tick activity: Still elevated from summer peak
Key hazard: Toxic mushrooms and fungi appearing in lawns and parks
Autumn Dog Care Tips
1. Adjust Exercise Routines as Days Shorten
With the clocks turning back at the end of April, many owners find their morning and evening walks shifting into darker conditions. This brings safety considerations that are easy to overlook until they become a problem.
Reflective gear: Invest in a reflective vest or collar for your dog and reflective ankle bands for yourself. Most NZ pet stores stock these affordably.
Leash or LED collar lights: A clip-on light lets drivers and cyclists see your dog even in low light.
Route awareness: Stick to well-lit paths, especially in Wellington and Auckland where traffic volume stays high into the evenings.
Mud management: Autumn rain means muddy trails. Keep a towel by the door and check paws after walks for cuts from hidden debris in wet grass.
2. Watch for Autumn Fungi and Mushrooms
This is one of the most underrated seasonal hazards for NZ dog owners. Autumn moisture triggers a surge in fungi growth across lawns, parks, and bushland from Northland to Southland. Many wild mushroom species are toxic to dogs — and curious dogs will investigate and sometimes eat them.
Urgent Warning: If your dog eats an unknown mushroom, contact your vet immediately. Symptoms of mushroom toxicity include vomiting, drooling, lethargy, jaundice, and in severe cases, seizures. Do not wait for symptoms to worsen.
Regularly check your garden and remove any mushrooms or fungi as soon as they appear
Supervise your dog closely in parks and on bush walks during March to May
Teach a reliable “leave it” command — it could save your dog’s life
If in doubt about what your dog ate, photograph the fungus and take it to the vet with you
3. Coat and Grooming Changes
Autumn triggers a seasonal moult in many dog breeds as their summer coat is shed and a thicker winter undercoat grows in. You may notice significantly more shedding from March through April. Regular brushing during this period:
Reduces the volume of hair on your floors, furniture, and clothing
Prevents matting, particularly in double-coated breeds like Border Collies, Golden Retrievers, and Huskies
Allows you to check the skin condition and spot any signs of irritation, fleas, or grass seed injuries from summer
Short-coated breeds like Staffies and Boxers may benefit from a dog coat or jacket on cold South Island mornings or on elevated Wellington days when the southerly bites.
4. Diet and Weight Management
As activity levels shift with shorter days and wetter weather, some dogs naturally reduce their exercise volume. This can lead to gradual weight gain if feeding quantities are not adjusted. Autumn is also a natural time to assess your dog’s body condition score:
You should be able to feel (but not prominently see) your dog’s ribs
There should be a visible waist when viewed from above
The abdomen should tuck up slightly when viewed from the side
If your dog is gaining weight, reduce treat quantities first, then consider slightly smaller meal portions. Consult your vet before making significant dietary changes.
Autumn Cat Care Tips
1. The Great Autumn Moult
Like dogs, cats undergo a seasonal coat change in autumn. Indoor cats may shed more throughout the year due to consistent artificial lighting, but outdoor and semi-outdoor cats will show a more pronounced autumn moult. Daily brushing during peak shedding weeks helps prevent hairballs — a common autumn complaint in longhaired breeds like Persians and Maine Coons.
Hairball Tip: Adding a small amount of pumpkin puree (plain, no additives) to your cat’s food can help hairballs pass naturally. Ask your vet about hairball prevention treats if the problem is recurring.
2. Outdoor Cats and Shorter Days
As daylight decreases, many outdoor cats naturally spend more time indoors. This is a good time to:
Ensure your cat has a warm, dry indoor sleeping spot away from draughts
Check that cat flaps are working properly and not letting in cold air when not in use
Review microchipping — autumn weather can disorient cats, particularly younger ones, and a registered microchip is their best chance of being reunited with you if they become lost
Provide additional indoor enrichment (climbing structures, puzzle feeders, interactive toys) as outdoor exploration time naturally reduces
3. Preparing for Cooler Nights
Even in Auckland and Hamilton, autumn nights drop to 12–14°C by May. Older cats, kittens, and cats with health conditions can feel the cold acutely. Consider:
A heated cat bed or a self-warming thermal mat (no electricity required)
Moving your cat’s sleeping area away from external walls or windows
For outdoor cats: providing a weatherproof outdoor shelter if they prefer to sleep outside
Parasite Control in Autumn
Many NZ pet owners make the mistake of thinking parasite prevention is only a summer concern. In reality, flea populations remain elevated well into May across the North Island, and some tick species are active throughout the year in coastal and bushy areas.
Fleas
Flea eggs that hatched in summer remain in your home environment and will continue to develop in the warmth of your heated home even as outdoor temperatures drop. If you stopped flea treatment in February, your pet may already be picking up fleas from the environment.
Continue year-round flea prevention on all pets in the household
Wash pet bedding weekly in hot water during peak shedding and flea season
Vacuum floors, furniture, and skirting boards frequently and empty the bag/canister outside immediately
Ticks
In NZ, the main tick concern is the paralysis tick (Ixodes holocyclus) which is less common here than in Australia but is present in some regions. The NZ cattle tick (Haemaphysalis longicornis) can also affect dogs. Check pets after walks in long grass or bush and consult your vet about appropriate tick prevention for your region.
Intestinal Worms
Autumn is a good time to worm your pets if you have not done so recently. Dogs and cats should generally be wormed every 3 months. Puppies and kittens require more frequent treatment — consult your vet for an appropriate schedule.
Autumn Gardening Hazards
The NZ autumn garden is full of seasonal hazards your pets could encounter. As you plant winter vegetables, mulch, or clear summer growth, be aware of the following:
Hazard
Risk
Action
Wild mushrooms and fungi
High — potentially fatal
Remove immediately, supervise pets outdoors
Slug and snail bait (metaldehyde)
Very high — toxic to dogs and cats
Use pet-safe alternatives (iron EDTA-based baits)
Compost bins
Medium — mouldy food is toxic
Secure lids, fence off compost areas
Autumn bulbs (daffodil, tulip)
Medium — bulbs especially toxic
Keep pets away during planting, store bulbs securely
Fallen stone fruit (plums, peaches)
Low-medium — pits contain cyanide
Clear fallen fruit regularly
Slug Bait Warning: Metaldehyde slug pellets are one of the most common causes of pet poisoning in NZ each year. Even a small amount can cause seizures and death. Switch to iron EDTA-based products (e.g., Quash or Tui Quash), which are effective against slugs and snails but much safer around pets.
Autumn Vet Check: What to Review
Autumn is an ideal time to schedule a general health check if your pet has not seen a vet recently. Key items to discuss include:
Vaccination status: Are your annual boosters up to date? Autumn is a common time to catch up before winter illness peaks.
Dental health: Dental disease worsens through winter when pets chew less on natural materials. A dental scale may be worth considering.
Weight check: Get a baseline weight before winter so you can monitor any seasonal changes.
Joint health: Cooler, damper weather aggravates arthritis in older pets. Discuss pain management options with your vet.
Coat condition: Dull or flaky coats can indicate nutritional deficiencies. Omega-3 fatty acid supplementation often helps.
Planning Autumn Pet Sitting and Holidays
ANZAC Day (25 April) is a popular long weekend for NZ families to take short breaks, and Easter (April) is one of the busiest travel periods of the year. If you’re planning to travel over any of these autumn holidays, booking pet care early is essential.
Book at least 4–6 weeks in advance for Easter and ANZAC Day, when demand for pet sitters spikes significantly
Hold a meet-and-greet: Introduce your sitter to your pet before your departure, especially if your pet has anxiety or special health needs
Leave a care sheet: Include feeding instructions, medication schedules, vet contact details, and any autumn-specific hazards to watch for in your garden
Share your pet’s routine: Autumn behavioural changes (more sleeping, reduced appetite) are normal but your sitter should know your pet’s baseline so they can identify anything out of the ordinary
Planning a holiday this Easter or ANZAC weekend?
ZiggySitters connects NZ pet owners with trusted, experienced pet sitters across the country. Book early — autumn holiday slots fill fast.
Continue flea and tick prevention through May (and year-round in the North Island)
Worm pets if not done in the past 3 months
Increase brushing frequency to manage the seasonal moult
Check and remove any mushrooms or fungi from your garden weekly
Replace metaldehyde slug bait with pet-safe alternatives before autumn rains
Add reflective gear to your dog’s walking kit as evenings darken
Prepare a warm, draft-free sleeping area for indoor cats and senior pets
Monitor your pet’s weight as exercise levels naturally shift
Book Easter and ANZAC Day pet sitting early
Schedule an autumn vet check if overdue for vaccinations or a health review
Final Thoughts
New Zealand’s autumn is a beautiful season — and with a few small adjustments, it can be just as enjoyable for your pets as it is for you. The key is staying ahead of seasonal changes rather than reacting to them. Regular grooming, smart parasite control, awareness of garden hazards, and a warm indoor retreat are the foundations of great autumn pet care.
And if you’re heading away over the school holidays, Easter, or ANZAC weekend, give yourself peace of mind by booking a trusted ZiggySitters pet sitter early. Your pets deserve the same care and comfort when you’re away as they get every day at home.
Autumn Pet Care Quick Summary
Keep up parasite prevention — fleas peak into May in the North Island
Watch for toxic mushrooms in lawns and on bush walks
Increase brushing to manage the autumn moult
Adjust diet if exercise levels drop as days shorten
Book holiday pet sitting 4–6 weeks ahead for Easter and ANZAC Day