Kohnke's Own Cal-Xtra

Protect Your Horse’s Bone Health with Cal-XTRA!  Formulated for horses grazing on oxalate-rich pastures, Cal-XTRA provides essential bone minerals to counteract calcium deficiency and prevent conditions like Big Head, bone weakness, and osteoporosis. 

✔  Prevents Bone Weakness & Big Head – Provides essential bone minerals, particularly calcium, to combat deficiencies caused by oxalate-rich grasses.

✔  Optimized for Horses in Tropical Regions – Specifically formulated for horses grazing in Queensland, the Northern Territory, and parts of NSW and Victoria, where oxalates reduce calcium absorption.

✔  Superior Calcium Uptake – Features a specialised micro-coating technology that helps calcium absorption, preventing demineralisation and ensuring bone strength.

✔  Supports Performance Horses – Also ideal for horses on high-grain diets, promoting bone strength and soundness during moderate to intense training.
Keep your horse strong from the inside out with Cal-XTRA!

Which Horses Benefit?

Cal-XTRA provides high strength additional calcium and important bone minerals in cases where extra is needed, for example, during bone regeneration, or when rapidly growing tropical grasses are the dominant pasture type available to the horse.

• Horses in QLD and NT, where tropical and subtropical grasses such as setaria, para, buffel, pangola, kikuya, couch grass and green panic are at high levels in the pastures
• Horses in parts of NSW and VIC where kikuyu has invaded the pastures in coastal regions, causing osteoporosis and Big Head in horses even when owners don’t suspect it could be a problem
• In spring and summer (or for fertilised pastures), when grass growth is rapid and tropical grasses contain higher levels of oxalates
• Horses consuming predominately Teff hay or pangola hay which may contain high levels of oxalate chemicals
• For bone mineral needs in horses with high phytate dietary sources (including bran and certain grains)
• For horses with extra bone mineral needs, including those in regular work and with low lucerne diets.  
• For horses suffering from bone demineralisation or Big Head.  

Major Ingredients:

Cal-XTRA is a concentrated source of important bone minerals, including calcium, phosphorus and magnesium in an optimum ratio to correct low or inadequate levels in the diets of growing, breeding, working or resting horses, especially those with a predominately grass-based diet.  

• Provides balanced bone minerals to help ensure optimum strength and soundness of the skeletal system in all horses.  
• Cal-XTRA is formulated with high purity calcium sources to optimise the important calcium to phosphorus ratio in horses.
• Cal-XTRA includes the important vitamins A and D3.  Vitamin A is necessary for calcium utilisation in the growth and maintenance of bone.  
• Vitamin D3 is involved in the regulation of calcium absorption to help bone development and maintenance of strong bones. 
• Cal-XTRA does not contain trace-minerals, such as zinc, iron, copper and selenium, because uptake of these trace-minerals is reduced in the presence of high calcium in a calcium supplement. 
• Cal-XTRA is not a full ration balancing supplement so it is recommended to provide a comprehensive nutritional supplement, such as Kohnke’s Own Cell-Provide, Cell-Vital or Cell-Perform, relative to the exercise level of the horse.  
• Cal-XTRA is a palatable powdered supplement with a dense consistency which is easy to mix into all types of feeds, wet or dry.  

Cal-XTRA does not swab or contain banned substances and does not contravene the Rules of Racing or FEI Competition. This product is a nutritional supplement to support the health and well-being of a horse. It does not artificially enhance the performance of racing or competition horses. Rules prohibiting the use of any pre-race supplements within 24 hours of racing should be followed if applicable in the local jurisdiction.

Supplementation Guidelines:

Each scoopful of Cal-XTRA provides 60 grams.  A handy table reference for full supplementary guidelines is included on each pack.  

For horses at rest, provide 60 grams daily of Cal-XTRA when grazing tropical grass pastures during slow growth periods.  Provide 120 grams daily during rapid growth periods or high oxalate pastures.  For ponies, provide half these amounts. 

For working horses, provide 80 grams per day during slow growth periods, and 150 grams per day during periods of rapid growth.  For ponies, provide half these amounts. 

Seasonal Influences or Fertilised Paddocks

Rapid grass growth periods, for example in Spring and Summer, or when paddocks are irrigated or fertilised (especially with nitrogen and phosphate fertilisers), further increase oxalate production, thus it is especially important to provide Cal-XTRA to horses grazing in these conditions.  

For Horses with ‘Big Head’

If horses have suffered bone weakness from grazing oxalate containing grasses, it is important to optimise Cal-XTRA supplementation.  Our studies have shown that curbing grazing behaviour for approximately 1 hour before providing Cal-XTRA, and for 1 hour after the feed is consumed, will further optimise calcium absorption to correct deficiencies that have resulted in bone weakness.  Where practical, remove the horse from the oxalate grass and provide the feed containing Cal-XTRA in a yard or stable to reduce pre- and post-feed grazing and ensure optimal calcium absorption from Cal-XTRA supplementation.  

Combining Cal-XTRA with Lucerne Hay

Lucerne as a legume crop contains higher levels of calcium and magnesium compared to other common hay varieties.  Each kilogram of lucerne as hay or chaff provides approximately 12 grams of calcium, thereby reducing the necessary supplementation rate of Cal-XTRA.  For horses on high oxalate pastures fed 2 kg of lucerne per day (1 biscuit hay plus lucerne chaff in feed), provide 40 grams of Cal-XTRA per day for horses at rest and 60 grams daily for working horses (400-600 kg body weight).  For more specific dose rates combining various rations with Cal-XTRA, contact our Nutritional Advisors at www.kohnkesown.com.