D620
pH Testing

Testing pH involves obtaining a sample and performing a simple test to determine how acidic or basic the sample is. Performing this test is important in situations such as grain overload (acidosis) and indigestion. With changes in pH, the normal bacteria and protozoa in the rumen change and even die off. The overgrowth and death of certain bugs can cause an animal to go off feed and show signs of indigestion. Determining the rumen pH is essential in diagnosing grain overload, since the normal rumen pH should be greater than 5.5 and preferably around 6 to 6.5. Any rumen sample with a pH of level less than 5.5 is indicative of acidosis and appropriate treatment should begin.

1. The most accurate way of testing pH is to perform a rumenocentesis. Taking a rumen sample by rumenocentesis requires the help of a veterinarian.
2. Another way of obtaining a rumen sample involves passing an oral tube into the rumen and withdrawing a sample. This method is not as accurate as taking a direct sample from the rumen by rumenocentesis (rumen tap). Once obtained, the sample can be tested using a pH meter or strip.
3. A final, and probably the least accurate way of measuring pH, is by sampling the fresh manure of the animal. This is done by using a pH meter or strip.

1. Lameness problems
2. Bloat
3. Diarrhea
4. Decreased milk production