Advanced Services from the Dairy One Forage Lab

Advanced services from the Dairy One Forage Lab have been developed to help you trouble shoot animal performance on farms. The services allow you to look deeper into the nutritional system at a farm or within a group of animals to find the weak points. For example using processing and particle size analysis with fecal starch can help you work out problems with milk yield, milk fat concentrations, or concerns about subacute ruminal acidosis.


(207) Fermentation Profile $25/sample

Wet chemistry analysis for evaluating silage fermentation quality. This test is useful for evaluating the management of silage storage. Report includes: lactic, acetic, lactic/acetic ratio, propionic, butyric, iso-butyric, VFA score, total acids, pH, crude protein, crude protein equivalent from ammonia, and ammonia N as a percentage of total N. The report includes reference numbers for the goal levels, typical levels and graphical results to aid in interpretation.

NDFDom Packages

Analysis for NDFDom at the multiple time points for forage and non-forage samples is available by wet chemistry. Wet chemistry on forage samples for NDFDom analyses is recommended if you are feeding an uncommon forage type, something other than straws, grass or legume based forages, or corn silages. Additionally feed libraries do not include the NDFDom numbers at the 3 time points for non-forages and NIR calibrations are not available yet, so wet chemistry of the 12, 72, and 120 hr time points is necessary.

1. (585) Forage NDFDom $77.00 – aNDFom, uNDFom and NDFDom at 30,120 & 240 hr

2. (586) Non Forage NDFDom $77.00 – aNDFom, uNDFom and NDFDom at 12, 72 & 120 hr


(225) Corn Silage Processing Score (CSPS) – $19/sample

Corn Silage Processing Score is a measure of the amount of particle size reduction of corn kernels in a corn silage sample from processing at harvest. It is measured on a dry whole corn silage sample. Prior to shaking, the starch (% DM) is measured in the sample. The sample is shaken for 10 minutes on a series of sieves. The percentage of starch that passes through the coarse sieves (< 4.75 mm) are the adequately processed kernels. The percentage of starch passing through the 4.75 mm sieve is determined by subtracting the amount of starch that did not pass through the 4.75 mm sieve from the total starch in the sample. The percentage of starch that remains or passed through the 4.75 mm sieve is the CSPS. The guidelines for interpreting the results are:

– Greater than 70% – Optimum
– 50 – 70% – Adequate
– Less than 50% – Inadequately Processed

Corn Silage Processing Score is $19/sample. This is in addition to the cost of a regular forage package. If you forget to select a package with your CSPS sample, it will automatically be assigned the (325) Forage NIR for $18/sample. This will bring the total cost to $37.

(226) Grain Particle Size (GPS) – $19/sample

Grain Particle Size is used to determine the distribution of particles within a grain sample. The particle size distribution is determined by shaking the sample through a series of 12 sieves. The weight of the sample retained on each sieve is divided into the total sample weight to determine the percentage of sample retained on each sieve. Results reported are: % sample on each sieve, Mean Particle Size in microns, Standard Deviation of particle size, and a graph of particle size distribution. Analyses can be performed on dry or wet samples (e.g. high moisture shell corn). Wet samples will be dried first. If you desire additional analysis on the material, please submit 2 – 1 quart bags.

(181) Fecal Starch – $12/sample

Fecal starch measurements are used to assess the starch digestibility of the ration. For good starch digestion, a fecal starch level of less than 5% is recommended. Two new fecal starch packages are now available. Both packages include dry matter, fecal starch, and total tract starch digestibility (TTSD). As it name implies, TTSD is an estimate of starch digestibility throughout the entire GI tract.  Two options:

1. (181) NIR Fecal Starch, $12 – cattle only
2. (182) Wet Chemistry Fecal Starch, $19 – all species

(125) Total Fatty Acids – $49/sample

The Fatty Acid profile of feeds is used to calculate fatty acid balances in rations and determine where fat supplementation is needed. The supply and balance of fatty acids in a ration can influence milk fat, milk production, and reproductive performance.

(611) Mold and Yeast – $25/sample

Mold and Yeast counts are reported as Colony Forming Units (CFU)/gram.  When submitting samples for mold and yeast analysis, do not freeze sample as freezing will reduce the counts and not represent the true mold level in the sample. Dry hay samples can be shipped as sampled.  If the sample is wet for hay or a wet feed or you are concerned that shipping will take more the 3 days, ship the sample on ice to limit mold growth during transportation. Mold and yeast analysis is $25/sample and takes approximately 1 week to process from the date received at the lab.

(612) Salmonella – $30/sample

Salmonella testing is appropriate for verifying if a feed safety system designed to reduce or eliminate salmonella from the feed is working or determine if a feed ingredient is compliant with a desired specification. Salmonella testing should not be used to prove the safety of a feed or feed ingredient. (National Grain and Feed Association, 2013)

(613) E. coli O157 – $35/sample

E. coli O157 contamination in feeds can occur and animals can become infected and continue to shed cells for months.

(229) Carbon – $10/sample

Percent carbon in a material represents the total structural component of the plant.

(179) % Grass – $5/sample

An NIR calibration was developed working with Cornell University to accurately predict the percent grass in a dry hay, silage, or fresh forage sample. The results are useful in interpreting other nutrient analysis results like aNDF and ADF. Knowing the percent grass is also to useful to fine tune nutrient and lime recommendations.

*All prices in US dollars.  Prices subject to change without notice.