Absolutely! Billions of bacteria live, reproduce, eat and die in the rumen of a cow, and the many species of bacteria found in the rumen which, along with protozoa and fungi, make up a literal ecosystem within the gut of a cow. These bacteria break down the cellulose, starch and fibre which is present in the diet of a cow, and turn them into volatile fatty acids, microbial protein and release other essential nutrients that both the microbes and the cow need for their health and productivity. Protozoa are actually predators to bacteria, and fungi act like plants in a landscape, where bacteria can hide and live in their attempt to eat and not be eaten, just like in any natural ecosystem.
The fact of the matter is, a cow cannot consume what she does without the kind of microflora she has in her rumen. She would be an entirely different animal, and certainly not the beloved, large, lumbering herbivore we all love and adore three times a day.
The animals need the bacteria to help break down the food. The bacteria benefit since they get food, while we benefit since the bacteria help us digest our food.
Because your need bacteria in your body to help digest food you eat.
Because it contains sewage. It may need to be pumped out, or bacteria may need to be added to help digest the sewage.
Some bacteria synthesize vitamins that your body cannot. A non-pathogenic strain of E. coli, for example, synthesizes vitamin K, used in clotting. Bacteria help properly digest food, extracting precious nutrients which your body then uses. Harmful bacteria is often killed by the good bacteria, known as microbiota, or incorrectly, normal flora.
To help digest food. It's found in the mouth and is from the salivary glands.
Baby elephants (as well as some other animals) eat the feces of their mother or other animals in the herd to obtain the bacteria they need to digest their food. Elephants digest plant matter in their gut using bacteria, and since elephants are born without this bacteria, they need to eat the feces of other elephants to obtain it.
To digest food.
To get to the other side
Horses have bacteria in their gut that helps digest their food. The bacteria needs time to adjust to new food so you add a little at a time. If you change the food quickly the horse could get stomach ache (colic) as it wont be able to digest the new food. Colic is a serious condition in horses and can be life threatening so best avoided.
So you have to digest so you can absorb nutrients and protein
We need to digest food so that the cells have energy to keep moving and reproducing. Without the digestive system we would always be hungry.
Because you can only proscess your food if it is digested.