Flystrike in Guinea Pigs

Posted by guineapiggles on 02 Oct 2018
Flystrike in Guinea Pigs

What is Flystrike?

You might have heard of flystrike in guinea pigs but you may not realise how much of a threat this can pose to your pet. So, what is flystrike?

Flystrike (scientific name “myiasis”) is a painful and dangerous condition whereby flies lay eggs on your guinea pig (usually their bottom) or in their housing which hatch into maggots.

These maggots then begin to eat away at the flesh of your pet burying deeper and deeper and releasing deadly toxins which can lead to toxic shock and death if not treated immediately by a professional. 

Once this infestation has taken hold, your pet’s condition can deteriorate extremely rapidly, in fact, the fly eggs can hatch within hours in the hot summer months, so it is vital you take immediate action and call your vet who will treat it as an emergency. 

What Causes Flystrike?

Flies thrive on damp, smelly environments and are attracted by:

  • A dirty bottom
  • Fur that has become wet with urine
  • Sores and open wounds
  • Dirty hutches and cages

The hot summer months (in the UK) is when this condition is at its most prevalent. There are lots of flies around at this time of year and the hotter it is, the faster the fly eggs will hatch into maggots.

However, summer is not the only season when it can occur so you should be vigilant throughout the year, even in the colder months.

This condition can occur even on a clean pet but if your guinea pig has problems cleaning themselves thoroughly for any reason (eg, they are overweight, have tooth or bladder problems), they are at a higher risk of getting this deadly condition as they will be more attractive to flies looking for somewhere to lay their eggs.

If your guinea pig is ill and suffering from diarrhoea or particularly smelly urine, this will make them a more likely target for flies.

The cleaner you keep your pet and their housing, the less risk they have of encountering this awful condition.

Symptoms of Flystrike

Signs of flystrike are not always noticeable until it is too late. This is why it is important to understand how to prevent this condition.

Flies will usually lay their eggs around the guinea pig’s anus so you might see maggots in that area. However, they may also be visible on other parts of your guinea pig or in their hutch.

You might notice wounds on your guinea pig which is a sign that maggots have begun eating away at the flesh. Your pet may also not appear to be their usual selves.

If you notice signs of flystrike on your pet, please follow the instructions below.

What Should I Do if My Guinea Pig Has Flystrike?

If you think your guinea pig might have flystrike, you should call your vet straight away, explain your concerns and make an appointment as soon as possible. Any reputable vet will give you an emergency appointment if they know your guinea pig has flystrike.

Discovering flystrike in its early stages and getting the medical attention they need as quickly as possible can save their lives.

Don’t wait to see if they get better as it is vital they get immediate treatment to prevent their condition deteriorating. If they don’t get the professional treatment they need, your guinea pigs may not make it.

It is sometimes suggested that you should remove the maggots with tweezers but this can cause distress leading to toxic shock in your pet. The same goes for putting your pet in water to get rid of the maggots - it is NOT ADVISABLE for you to do either of these.

It is better to get them to your vet straight away and for them to receive treatment from a skilled professional.

You should take all guinea pigs who are with the one who is affected to the vet. There is a chance that if one has the condition, the others may also have it. Even if you don’t see any symptoms in your other guinea pigs, you should still get them checked over to make sure they are ok.

What is the Treatment for Flystrike?

The vet may sedate your guinea pig and trim the fur around the affected area so they can more easily remove the maggots and eggs. 

If this is possible, they may also give your guinea pig some medication to kill the maggots that have worked their way in to your guinea pigs flesh. Medications they may give you may include antibiotics to fight infections, fluid therapy, anti-inflammatories, anti-parasitic drugs and antiseptic creams.

Will My Guinea Pig Recover from Flystrike?

Your guinea pig can recover from flystrike if it's caught in the early stages and your vet will do all they can to treat this condition.

However, sometimes it is just spotted too late. If maggots have penetrated too far into your pet, your vet may recommend your guinea pig is euthanized (or put to sleep). 

This is a last resort and something no vet would take lightly. However, this is an extremely nasty condition and if it is left too long, there may be no effective treatment that can help them and your guinea pig will sadly deteriorate and suffer a lot of pain. 

The most humane thing to do in these circumstances is to release your pet from the pain.

This is why it is important to take preventative measures to stop your pet from getting flystrike.

How Can I Prevent Flystrike?

There is no vaccination for flystrike so the most important prevention advice is to keep your guinea pigs and their hutch clean. However, it is also critical that you are watchful and follow all the steps below to protect your guinea pigs against flystrike.

  • Clean your guinea pig’s cage on a regular basis. Never let it get to the point where it smells bad and use a pet-friendly disinfectant to clean the housing.  Soiled bedding should always be removed on a daily basis and a full clean should be carried out at least every week. Find out how to clean the cage here...
  • Make sure your guinea pig’s fur is kept clean. If you have a longer-haired pet you should groom him daily and you might need to trim his fur to prevent it getting dirty. You may also need to bathe him every few months . Never leave him dirty and smelly as he will be a fly magnet.
  • Check your pets twice a day. This will ensure that you notice anything early and can save your guinea pig’s life. Give a thorough check of their fur and especially around their bum area.
  • Keep your pet indoors. Although it is not just outdoor guinea pigs who get flystrike, it is less likely there will be so many flies indoors and you can keep a closer eye on them.Take a look at recommended guinea pig cages here...
  • Feed your pet a good diet. This will help prevent diarrhoea or other health problems that can encourage flies to their housing. Too much fruit or a generally bad diet can cause problems. More about a guinea pig's daily diet...
  • A guinea pig with arthritis, tooth problems, bladder problems or obesity can find it difficult to keep clean. If you find your guinea pig isn’t keeping himself as clean as usual, make an appointment with the vet for a check up to make sure he hasn’t got any health issues.
  • Ensure any wounds are looked at by a vet, kept clean and inspect them daily and heed your vet’s advice regarding care of any wounds until they have healed
  • Don’t leave food bowls with fresh fruit or vegetables in their cage as flies will be attracted to rotting vegetables and fruit. Once their mealtime is over and they’ve lost interest, remove the bowls and discard the remaining food.
  • If you have a fly problem, it is worth considering covering their housing with an insect mesh which will prevent flies getting into the cage or hutch.
  • If you see flies near the housing, you should ensure you check your guinea pigs more regularly, keep them clean and preferably bring them indoors if they are outside.
  • If you see eggs on your guinea pig’s fur, remove them and take them to the vet straight away for a check up. You may have caught them early but be sure it doesn’t get worse or they may not get better. Remember, these eggs will hatch within hours.

If you want to prevent flies coming into the hutch, you could try this insect mesh...

Is Flystrike Protector Spray Safe to Use?

There are some flystrike protector sprays (fly repellents) available to buy which are made especially for guinea pigs but are they safe? 

We at Guinea Piggles don’t like to use chemical products and prefer the natural prevention methods we’ve listed above rather than opting for this type of product. 

However, if you have a fly problem and want to ensure your guinea pigs are protected this may be a good idea. Make sure it is marked as safe for guinea pigs before purchasing and follow the instructions carefully.

Do not use any type of household fly spray on or anywhere near your guinea pig. These are not designed for pets and are extremely dangerous!

Flystrike Can Kill Your Guinea Pig - Please Don’t Let it Happen to Your Pets

We hope this has helped you understand how horrific flystrike can be and how you can prevent this happening in your guinea pigs. In summary, keep them healthy and clean, keep the hutch clean, be vigilant and use fine netting to prevent flies getting in to their housing as an extra precaution.

Insect mesh can help prevent flies getting in - click here to view the product

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