Today we are focusing on the distressing condition of Flystrike in Guinea Pigs.
What is Fly Strike?:
- Fly strike is a condition where adult flies lay their eggs on animals.
- Maggots hatch from the eggs and eat the surrounding flesh of the animal.
- Not only does this essentially eat the animal alive but the maggots also release toxins that slowly poison the guinea pig.
- This happens in damp and/or dirty places, so usually around the rear end of the guinea pig.
What are the symptoms of Flystrike in Guinea Pigs? / Does my Guinea Pig have Flystrike?:
Symptoms include:
- Visible maggots on Guinea Pig.
- Visible eggs on Guinea Pig.
- A Guinea Pig repeatedly reaching around to its bottom may draw your attention to this.
- Late stage Flystrike produces a distressed pig that will stop eating, drinking and may fit. This animal is dying from its infestation.
Flystrike kills Guinea Pigs, if in doubt please see a vet immediately.

How can you prevent Flystrike in Guinea Pigs ?:
- Keep their cages clean.
- Immediately treat any illnesses that cause wet/dirty bottoms.
- Keep flies away from area.
- Check your piggies’ bottoms regularly.
- A spray like Johnson’s Fly Strike Protection for Small Animals or Beophar Fly Guard may help protect your pigs.
How to treat Flystrike in Guinea Pigs?:
- If you see symptoms of Flystrike get your pig to a vet immediately. Flystrike is a veterinary emergency.
- Whilst you wait try to get as many maggots off your pig by using a warm damp tissue (use gloves if squemish).
- The maggots may have reached internal tissues and no longer be visible so you should still see a vet. Your pet may need antibiotics to survive.
Please also see our guides to Heatstroke and staying safe in the Hot Weather.
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