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Dynalac is a unique blend of specially selected fat sources, processed onto carrier materials that enhance and protect the fat component. The result is a friable meal with excellent handling properties, extremely palatable and readily acceptable to cows and other ruminant livestock of all ages.


Dynalac is primarily designed for feeding to dairy cows, for incorporation into mixed diets and blends and compound feeds. It can also be top-dressed onto silage and other forages. Typical daily feed rates are as follows;

Dairy cows

400 - 750 grammes


400 - 750 grammes


50 - 150 grammes


200 - 450 grammes

Dynalacs' excellent handling properties allow accurate weighing and measuring. Available in 25kg bags, packed 50 to a pallet (1.25 tonnes) or 1 tonne tote bags.


Oil %


Protein %


Fibre %


Ash %


ME (MJ/kg)


Dry Matter %


All analyses are typical and are quoted on a dry-matter basis. Continual development of UFAC UK products occurs, and so this analysis may change.


Soya Oil

Olive Oil

Sunflower Oil

Rape Oil

Marine Oil


Special Rumen-inert Carrier


Blend of oils can vary with availability and to reflect ambient temperature

Dynalac does not contain Palm Oil

Aims, Features and Benefits

Increase Milk Yield and/or milk constituents
28 MJ
Increases energy density (M/D) of ration
Maintains energy supply within restricted DMI limits
Avoid SARA
Not Rumen-active
Highly concentrated energy source that is not fermented in the rumen, thus completely avoids any risk of SARA.
Reduce bodyweight loss
Synergistic Oil Blend
Highly available blend of oils, very rapidly digested to reduce demand on body fat reserves.
Improve fertility and Immune Function
Contains Marine Oil / high Omega 3 Levels
Omega 3 has been shown to improve egg and embryo viability and is an anti-inflammatory
Maintain DMI, maintain forage utilisation
Matrix Protection
As the fats used are pure and not calcium soaps (saponified), dry matter intake is maintained; significant reductions in DMI are reported when calcium soaps are used
Confidence in Product
15 years feeding Dairy Cows
Dynalac has been fed to countless thousands of dairy cows over the past 15 years with excellent results
On Farm Trials to confirm efficacy
Numerous trials confirm milk yield / constituent increases, and direct replacement of calcium soaps.

Fatty Acid Profile



2.6 - 3.1



1.3 - 1.5



14.2 - 17.3



0.9 - 1.1



2.9 - 3.5


Oleic Acid

19.7 - 24.1



11.2 - 13.8

% Saturates

6.6 - 8.0

% Unsaturates

42.5 - 53.0



0.8 - 1.5


Variation in fatty acid profile comes from the raw materials themselves and the need to compensate for ambient temperatures.

Product Reference Code: P1176

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Further Information

Fats and oils contain about 3x the energy content of carbohydrate sources such as cereals, beet pulp and forages. For this reason they are extremely useful in formulating diets, as they allow flexibility and relieve pressure on a key limitation, namely DMI. Cows on lash spring grass can consume up to 1500 grammes of fat, obviously with no adverse effect.


Fats are generally found in nature as triglycerides; that is, 3 fatty acids bound to a glycerol molecule very much like the capital letter E;

In almost all cases, absorption of fats into the body occurs in the small intestine, NOT the rumen; and this absorption is of the individual fatty acids. These are split off from the glycerol by bacterial action in the rumen, such that 85 - 90% of fats leaving the rumen are as free fatty acids. If any fatty acids still remain attached to glycerol post-rumen, enzymes complete the process.

Where highly saturated (hard) fats are fed, this bacterial action is prevented. With such a high melting point, the bacterial enzymes cannot penetrate the fat and so breakdown is stopped. Such fats then enter the small intestine still as triglycerides and are voided in the faeces - in other words they are wasted.

Unsaturated Fatty Acids are used in the rumen as receptors for hydrogen ions, and are therefore useful in reducing methane production. This process - biohydrogenation - increases the saturation level of unsaturated fats. Fats that already saturated - such as hard fats like palm oil - cannot act as hydrogen ion receptors and therefore have little or no impact on methane production.

From the small intestine, fats are transported in the blood and lymph to various parts of the body. In muscles the fats are oxidised ("burnt") to provide energy; fats transported to the mammary gland is excreted as milk fat. Note that dietary fats are NOT transported directly to the liver; accumulations of fat in the liver (fatty liver syndrome) come about from accumulation of triglyceride driven by extensive mobilization of NEFA from adipose tissue during negative energy balance, and the conversion of NEFA back to triglyceride in the liver.

From this is clear that selection of balanced sources of fats and oils and an understanding of their impact on the metabolic systems in livestock are essential. The use of such blends provides a synergistic effect, and avoids the digestibility issues associated with simple, saturated fat products.


Dry Matter Intake (DMI) is viewed as one of the most important barriers to improved production. Generally speaking, the more an animal consumes, the more productive they are; and, more often than not, the more efficient they are at converting feed into saleable commodity ( milk, meat, eggs etc.). Some fat products - notably calcium soap products - are recognised as reducing DMI. Studies by Harvatine et al (1) and Weiss et al (2) showed DMI depression in diets containing calcium soap products compared to diets containing other fat sources.

Energy is described in a variety of ways. The total amount of energy in any material is GROSS energy. Biological systems are never 100% efficient, and energy is partitioned to perform different functions within the body; hence we derive the following recognised terms to describe energy actually used by livestock;

In the UK the unit of choice is METABOLISABLE energy (ME). The above diagram explains that this measure takes account of the energy lost through faeces and urine. With regard to fats, the hard, saturated fats lost via the faeces will have markedly lower ME than the blended vegetable oils used in Dynalac. This is not always reflected in figures quoted by some companies. Voigt et al (3) looked at NET energy (NE) for a variety of fat sources; they found that some products, such as hydrogenated palm oils, had NE values as low as 2.4 MJ / kg DM.


Over the years, Dynalac has been tested time and again on farm. It has consistently proved to be effective at increasing milk yields, constituents and profitability.

Trial TMCM1; replacement of wheat with Dynalac on a weight for weight basis.

Milk Yeild (litres)
Milk Protein (%)
Butterfat (%)
Increase in Profit / cow

Trial DR1; replacement of wheat with Dynalac on a weight for weight basis.

Milk Yeild (litres)
Milk Protein (%)
Butterfat (%)
Increase in Profit / cow

Trial DW1; replacement of sugar beet pulp with Dynalac on a weight basis

Milk Yeild (litres)
Milk Protein (%)
Butterfat (%)
Increase in Profit / cow

Trial DW2; replacement of Megalac with Dynalac on a weight basis

Milk Yeild (litres)
Milk Protein (%)
Butterfat (%)
Increase in Profit / cow
  1. Harvatine, K.J. and M.S. Allen. 2004. Effect of rumen-protected fatty acid saturation on feed intake and feeding and chewing behaviour of lactating dairy cows. J. Dairy Sci. 87 (suppl. 1) Abstr. W95, p. 336.
  2. Weiss, W.P. and D.J. Wyatt. 2004.Digestible Energy Values of Diets with Different Fat Supplements when Fed to Lactating Dairy Cows. J. Dairy Sci. 87:1446-1454.
  3. Voigt, J., Kuhla S., Gaafar K., Derno M., and Hagenmeister H. 2006. Digestibility of Rumen Protected Fat in Cattle . Slovak J. Anim. Sci. 39: 16-19