Harkers 4 in 1 Soluble

Harkers 4 in 1 Soluble

Images are for illustration purposes only. Packaging may change from time to time and images on our website may or may not be updated.

  • 100ml £19.99


A flock treatment for canker, coccidiosis, worms and external parasites (lice and mites) in racing pigeons which can be simply added to the drinking water.

Need help or advice? Contact us:

All prices include VAT where applicable.


No Reviews for Harkers 4 in 1 Soluble

Only verified purchasers of this product can leave a review.

Q & A

Below are some recent questions we've received regarding Harkers 4 in 1 Soluble, including answers from our team.

20 August 2021 at 8:56pm

Is this product suitable for chickens with canker


I have one chicken with canker, can I use this also as a preventative for my other chickens thank you

  • VioVet Staff

This medication is licensed for use in Pigeons only. Any use in chickens is off license and we would require a written prescription from your vet to dispense it to you. There are unfortunately no over the counter medicative treatments for Canker in chickens, I advise chatting to your vet for appropriate treatments.

12 July 2021 at 8:12am

It is safe for other animals in a communal bowl in the garden


I have lots of feral pigeons and other birds visit my garden daily. I have seen some pigeons with various diseases and have always taken them to my local wildlife rescue, but they are quite far away. Can I treat the birds as a group without it endangering the lives of other animals. My cat also drinks out of the same bowl on occasion. The water is changed daily.

  • VioVet Staff

This product is licensed for use in pigeons only. The datasheet does not state whether it is safe in other garden birds or animals, such as cats.  We therefore unfortunately cannot advise on whether it is safe in other animals. Your vet can provide information on the off license use of medications though so I recommend contacting them.

1 June 2021 at 5:20pm

Mite treatment

christopher riley

Hi. Is this product suitable for finches? Thank you.

  • VioVet Staff

This product is suitable for use in pigeons only. You can use Xeno-50 Spot On for your finches though to treat mites, just follow the doseage depending on the weight of your finches.

Delivery Information