Calf mortality rate in 2007 in Peshawar (Pakistan) was 17.98% (Khan et al., 2007). Major causes of mortality of neonatal calves were the conditions like diarrhea and pneumonia (Khan et al., 2009, Shimizu and Nagatoma 1978). The neonatal calf mortality in the first month of age is more than 80% of the total mortality in calves (Jenny et al., 1981). Mortality in calves was found due to the conditions e.g. Feeding practices, managemental practices, weather conditions, bacterial and viral infections especially those causing septicemia, diarrhea and enteritis (Blood et al., 1994).The etiology of neonatal calf diarrhea involves a variety of infectious, nutritional, immunological and environmental factors. Many of the infectious agents have been isolated and identified from the feces and tissues of diarrheic calves but the relative importance of each one has not been established. Recently, infections of individual calves and herds with multiple enteropathogens have been described (Acres et al 1977; Moren M.1974; Brown et al 1973).

Gastrointestinal parasites are affecting the animals including the wildlife. The major consequence of the parasites is that they cause a large number of morbidity and mortality of the animals and same was the case with deer. Deer were being highly infested by the endo-parasites and having diverse effects in their health. By doing different experimental trails we can reduce the burden of the helminths. Different anthelminthics can help in reducing the parasitic load and make the animal heather. By introducing a proper and regular de-worming progam, i.e after every three months, the problems by the endo-parasites can be reduced. Lesser the helminths are, greater the animal feel.

The dog amongst all the animals has proved to be the man's best friend and faithful companion because of its fidelity, loyalty, obedience and pleasant disposition. Dogs appeared on the earth about 20 million years ago (Sharma et al., 1993). The dog's stomach is a sac-like structure designed to store large volumes of food and begin the digestive process. Once eaten, most food leaves the stomach within twelve hours after entering. The esophagus carries food to the stomach, where it enters via a valve-like structure called the cardiac sphincter. On the interior surface of the stomach is a series of folds called gastric folds. These folds function to help grind and digest food. The inner stomach lining secretes acids and enzymes to break food down as the initial step in the digestive process. Once the initial stomach digestive process is complete, the partially digested food exits the stomach through the pyloric sphincter area and then enters the duodenum (small intestine).

The dog is globally recognized as the man's first domesticated animal because of its fidelity, loyalty, obedience and pleasant disposition. Since the beginning of human civilization, they have been bred and selected for different purposes like guards, sports and reserve of wounded humans. Helminthes are classified into tapeworms (cestodes), roundworm and trematodes (flukes). Helminthiasis is one of the most important animal diseases worldwide, resulting great production and health losses in animals. Among the dogs, roundworms are active in the intestines of puppies, often causing a pot-bellied appearance and poor growth. The worms may be seen in vomit or stool; a severe infestation can cause death by intestinal blockage.

Livestock has a great significance in the development of economic conditions of a country. In Pakistan the share of Livestock sector is approximately 53.2 percent in the agriculture value and 11.4 percent in national GDP during 2009-10. While other development sector experienced saturation and decline, there is trend in increase of livestock population in 2009-10. Total number of buffaloes and cattle is 30.8 and 34.3 millions respectively in Pakistan (Anonymous, 2009-10). The number of buffaloes and cattle is 14.4 and 17.8 millions respectively in Punjab province (Anonymous, 2006). Punjab is a home of highly specialized tropical/subtropical buffaloes and cattle breeds. Those animals suffer from a number of diseases. Ketosis is one of them, define as metabolic disorder and it is managmental influenced cows disease during the early lactation period.

Contribution of livestock is about % of agriculture value and 11.4 % to the national GDP ith a total number of animals of million.In Pakistan the trend of extensive farming is common and has open grazing in the feild. Most of the farmers have up to 6 number of animals while sixteen percent farmers have more than 6 nimals. Gastrointestinal parasites are very common in sheep because of their open grazing and watering habbits. Parasites cause the economic losses and considered one of the most common infections.

Mastitis is the inflammation of the parenchyma of mammary glands; it is characterized by a range of physical and chemical changes in the glandular tissues. It is an important disease of cattle and buffaloes. In Pakistan, during the year 2005-06, Cattle population was 25.5 millions, while buffalo's population was 28.4 million. Within the livestock sector, milk is the largest and the single most important commodity. Despite decades of neglect, Pakistan is the fifth largest milk producer in the world (Anonymous, 2006). Production of high-quality milk is a high-priority issue for dairy farmers and milk processors. The investigation of mastitis problems on dairy farms is an area of increasing demand and is an ideal way for veterinary practitioners to increase involvement in production medicine programs (Ruegg, 2003). The prevalence of mastitis was significantly higher in the early lactation stage than in the mid-lactation stage, in cows with lesions and/or tick infestation on skin of udder and/or teats than in cows without this factor, and in the wet season than in the dry season. Mastitis increased with parity number (Dego and Tareke, 2003).

Poultry industry is an important portion of the livestock sector contributing in the national economy and the current status of Pakistan poultry industry is about Rs. 100 billion. There are about 25,000 poultry farms in the country. Poultry sector generates employment & income for about twelve hundred thousand people. Its growth rate is 10- 12% annually. Pakistan is producing 10,000 million table eggs & 750 thousand metric tons chicken meat annually. The per capita consumption of meat is 7 kg & 60-65 eggs annually (Anonymous, 2008) but unfortunately so many threats & fatal diseases i.e. bacterial, viral, fungal & parasitic diseases are still disturbing the industry. Among parasitic diseases, coccidiosis is one of the most important hazard. It is the disease of poultry caused by an obligate microscopic protozoan parasite, which belongs to the genus Eimeria (phylum Apicomplexa). Seven Eimeria species have been recognized infecting chicken: E. acervulina, E. maxima, E. tenella, E. brunette, E. necatrix, E. mitis & E. praecox.