Pigeon Diseases: Canker and Paramyxovirus Explained
Pigeon diseases explained: how to recognise canker and paramyxovirus (PMV), how they spread, what a vet typically does, and how to protect your loft from both.
Health guide
Not a substitute for a vet. If your animal is unwell, in pain or getting worse, contact a qualified veterinarian straight away.
Quick answer
Canker (trichomoniasis) is a parasite infection that leaves yellow, cheesy growths in a pigeon's mouth and throat. Pigeon paramyxovirus (PPMV-1, usually called PMV) is a virus. It causes very watery droppings and nervous signs such as a twisted neck and circling. A vet can treat canker with prescription medicine. PMV has no cure, but vaccination greatly reduces the risk. Isolate any sick bird straight away and get a vet's diagnosis before you treat.
Why these two matter
Canker and paramyxovirus are two of the commonest and most serious diseases in racing, fancy and pet pigeons, and anyone who rescues feral pigeons will meet them too. Early on they can look alike, just a fluffed-up bird that isn't eating much, but the right response to each is very different.
Canker (trichomoniasis)
What it is
Canker comes from a single-celled parasite, Trichomonas gallinae. Lots of pigeons carry a few without being ill. The bird gets sick when the parasite numbers climb or its defences fall, for example through stress, another illness, overcrowding, racing or breeding.
How it spreads
- Shared drinkers, especially open water that becomes contaminated
- Parents to squabs during feeding with crop milk
- Billing between mates
- Contaminated feed
Signs
| Form | What you may see |
|---|---|
| Throat (oral) | Yellow-white cheesy plaques in the mouth or throat, difficulty swallowing, stretching the neck, wet or sticky mouth, bad smell |
| Navel (squabs) | Swelling at the navel area in young birds |
| Internal | Weight loss, poor condition, sometimes lesions on internal organs |
| General | Fluffed up, reduced appetite, drinking more, green watery droppings, poor performance |
In squabs, canker can block the throat and kill quickly.
What a vet typically does
A vet will usually confirm canker by looking in the mouth and checking a swab under a microscope. It's treated with a prescription anti-protozoal medicine, given to the single bird or the whole loft as the vet advises. Stick carefully to the product and dose your vet chooses, and finish the course. Some lofts now have resistant strains because these medicines were overused or underdosed. That's why routine "just in case" treatment without a diagnosis is discouraged.
Never try to pull plaques out of the throat. They are often attached to the tissue underneath and can bleed heavily.
Preventing canker
- Clean and refill drinkers every day, and use drinkers designed to limit contamination.
- Don't overcrowd, and keep the loft dry and well ventilated.
- Quarantine new birds and look in their mouths.
- Keep wild and feral pigeons away from your loft's food and water.
- Ask your vet about checks before the breeding and racing seasons.
Pigeon paramyxovirus (PMV)
What it is
Pigeon paramyxovirus type 1 is a pigeon-adapted strain of the same virus that causes Newcastle disease in poultry. It mainly affects pigeons and doves, and passes between them easily, but it can occasionally infect chickens, so keep pigeons and poultry apart. Vaccination and reporting rules differ by country, so check what applies where you live.
How it spreads
- Droppings and discharges from infected birds
- Contaminated feed, water, baskets, clothing and equipment
- Contact with infected birds at shows, races or markets, or with feral pigeons
Signs
It often starts with the droppings, and nervous signs follow over a few days.
- Early: very watery droppings, often a formed piece of faeces in the middle of a lot of liquid; more thirst; less appetite; a quiet, fluffed-up bird.
- Nervous signs:
- Twisting of the head and neck (torticollis), sometimes looking upside down ("star-gazing")
- Circling, falling over, trembling
- Inability to peck accurately, missing seeds
- Paralysis of a wing or leg
Other problems can look much the same, including some bacterial infections, poisoning and injury, so you need a vet's diagnosis.
What a vet typically does
No medicine kills the virus. A vet will usually concentrate on supportive care, keeping the bird warm, hydrated and fed and heading off secondary infections where needed. Recovery can take several weeks. Some birds are left with a bit of a head tilt or tremor but still live comfortably. A vet can also tell you whether to vaccinate the rest of the loft.
Home nursing for a PMV bird
- Isolate it in a small, quiet, warm pen with soft bedding.
- Give it a deep, heavy water dish and a deep food bowl, or pile the seed up, so it can hit the food even with poor aim.
- Some birds need help to feed. Learn how from a vet before you try.
- Keep it away from every other pigeon and see to it last, washing your hands and changing your outer clothes afterwards.
Preventing PMV
- Vaccinate. Vaccines for pigeon paramyxovirus are widely used. Ask an avian or poultry vet about timing for adults and young birds.
- Quarantine new and returning birds.
- Disinfect baskets, drinkers and equipment.
- Limit contact with feral pigeons and unknown birds.
Canker vs PMV at a glance
| Canker | Paramyxovirus (PMV) | |
|---|---|---|
| Cause | Parasite (Trichomonas gallinae) | Virus (PPMV-1) |
| Key signs | Cheesy yellow plaques in mouth or throat | Very watery droppings, twisted neck, circling |
| Treatment | Prescription anti-protozoal from a vet | Supportive care; no antiviral cure |
| Prevention | Hygiene, clean water, quarantine | Vaccination, quarantine, hygiene |
When to see a vet
Contact a vet promptly if any pigeon shows:
- Yellow or white growths in the mouth or throat, or difficulty swallowing
- A twisted neck, circling, falling or trembling
- Very watery droppings, especially in several birds at once
- Sudden deaths in the loft
- Squabs that are not growing, have a bad-smelling mouth or a swollen navel
- Breathing difficulty or swollen eyes
Sudden illness or deaths in several birds can also point to diseases that must be reported in some countries. Your vet can advise.
In Pakistan
Pigeon keeping has a long history all over Pakistan, from rooftop high-flyers to fancy breeds. Birds change hands constantly at markets and between keepers, and canker and PMV travel with them. Many keepers buy medicine over the counter and dose the whole loft without a diagnosis. That can hide what's really wrong and breeds resistance. You'll protect your flock far better with a vet's diagnosis, regular PMV vaccination and quarantine for new birds. In summer the birds drink more in the heat, so clean the drinkers daily.
For general bird care basics, see The Complete Guide to Keeping Pet Birds. Looking for healthy birds from careful keepers? Browse on Paalo.
Frequently asked questions
Can pigeons recover from paramyxovirus?
Many do, with good supportive care, though recovery often takes weeks and some birds are left with lasting nervous signs such as a twisted neck. There is no cure for the virus itself; care focuses on keeping the bird fed, hydrated and safe while it recovers.
Is canker contagious to other pigeons?
Yes. The parasite spreads through shared drinkers and feeders and from parents to squabs through crop milk. Many healthy-looking pigeons carry it at low levels. Clean water and good loft hygiene reduce spread.
Can humans catch pigeon paramyxovirus?
Pigeon paramyxovirus is a bird virus and is not considered a significant risk to people, but always wash your hands after handling sick birds and cleaning the loft. Some other pigeon infections can affect people.
