Intra Calferol


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Product Description

Intra Calferol is an intensive liquid calcium, vitamin D3 and magnesium premix for all bird species. Calferol is pH neutral and has excellent vitamin D3 stability properties. The mixture of calcium salts and calcium gluconate has a high bioavailability. The vitamin D3 is the essential component for the bone formation or for a good egg quality. The micro element magnesium is essential for the bone and egg shell matrix: 

Intra Calferol liquid calcium premix helps to keep the calcium balance of birds and animals at an optimum level. All elements of this high quality supplement work together to ensure strong bone formation or a reduction in poor egg shell quality as appropriate.

The result of using Intra Calferol  liquid calcium premix is improved bone strength and a vast reduction in the number of eggs with poor shell quality.

How Intra Calferol liquid calcium premix works:

The body needs vitamin D3 to absorb calcium.  Without enough vitamin D3 in poultry, the birds can't form enough of the hormone calcitriol.  This in turn leads to insufficient calcium absorption from the diet.  In this situation, the bird must  take calcium from its stores in the skeleton, which weakens existing bone and prevents the formation of strong, new bone. Bone Health, one of the most important roles of vitamin D3 is to maintain skeletal calcium balance by promoting calcium absorption in the intestines, promoting bone resorption by increasing osteoclast number, maintaining calcium and phosphate levels for bone formation, and allowing proper functioning of parathyroid hormone to maintain serum calcium levels. Vitamin D3 deficiency can result in lower bone mineral density and an increased risk of bone loss (osteoporosis).

The eggshell is a highly specialized mineralized structure, which provides protection against physical damage and penetration by micro-organisms. The egg shell consists of the inner and outer shell membranes, the true shell and the cuticle. The crystalline layer of the shell, which is responsible for its mechanical strength, consists of more than 90% calcium in the form of calcium carbonate. Calcium is absorbed from the feed in the intestine. Provided that sufficient calcium (3.8–4.2%) is present in the feed, the process of calcium uptake, deposition and excretion is regulated by vitamin D3 and its metabolites. Calferol takes care for sufficient Calcium to build up this eggshell and sufficient level of vitamin D3 to absorb the calcium.


Intra Calferol is a concentrated liquid premix of calcium, vitamin D3 and magnesium which is easy to absorb by the intestines of the animal.  The high quality feed supplement supports birds to keep the calcium balance in an optimum condition.

Intra Calferol can be applied via drinking water, at varying dosages according to requirements.  Please read the product label before use.

After any water treatment it is essential to sanitise the water lines to avoid the build up of residue or bio film. For this we recommend Intra Hydrocare. For further advice or guidance please call us on 01258 818239

Available in the following sizes:

  • 10 Litre - £ 32.65
  • 20 Litre - £ 59.25

‘’Having tried other products, I have used Calferol for several years.  There is a visible difference after 5 to 7 days when used as Quill advise.  I produce far less broken and cracked eggs and a lot more 1st grade.  I also observed a calming effect on the birds when using Calferol.  It truly is a remarkable product.’’ 

- Tristan Powell. (28,000 Birds)


As sole importer of Intracare products into the UK, the genuine Intra Calferol is only available from us.


If you would like some guidance regarding the dosage of any of our products, please do get in touch. Part of our service includes the creation of a bespoke water program, FREE of charge, for Quill Productions customers upon request.

Click here to view and download the Intra Calferol Safety Data Sheet

Please note: we are unable to ship liquids and aerosols overseas due to the current Government Safety Regulations. Customers from the Channel Islands, Republic of Ireland and Northern Ireland please enquire!

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Customer Reviews

Calferol gave me a good size, uniform egg with excellent shell quality. It allowed me to produce some excellent chicks, in what was otherwise a difficult year.

Kevin Andrews - Game Farmer

As our laying birds got older (around 65 weeks), we noticed that the egg shell quality was decreasing. It's very important for us to produce the best eggs we possibly can, so we fed Calferol into the water through our doser for 4 days at the recommended rate of 1 litre per 1000 litres of drinking water. Shortly after the treatment, I noticed the egg shells were of a higher quality with less thin shelled/bad shelled eggs being laid. I would highly recommend this produce to be used with older birds, and we shall be using it on all our flocks at the age of 62 weeks as a preventative measure.

Luke Sherratt - Green Croft Farm

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