Lameness is currently one of the most important and economically demanding diseases in cattle. It is manifested in a change in locomotion that is associated with lesions, especially the pelvic limbs. The disease of the hoof is painful, affecting the welfare of dairy cows. Important factors that influence the health of the limbs include nutrition, animal hygiene, stable technology, and genetic and breeding predispositions. Nutrition is one of the basic preventive factors affecting the quality and growth of the hoof horn, and the associated prevalence of hoof disease. The strength and structure of the hoof horn are affected by the composition of the feed ration (amino acids, minerals, vitamins, and toxic substances contaminating the feed ration, or arising in the feed ration as metabolites of fungi).

lameness in dairy cows is a worldwide problem, usually a consequence of hoof diseases. hoof problems have a negative impact on animal health and welfare as well as the economy of the farm. prevention and early diagnosis of lameness should prevent the development of the disease and consequent high costs of animal treatment. in this review, the most common causes of both infectious and noninfectious lesions are described. Susceptibility to lesions is primarily influenced by the quality of the horn. The quality of the horn is influenced by internal and external conditions such as hygiene, nutrition, hormonal changes during calving and lactation, the animal's age or genetic predisposition. The next part of this review summarizes the basic principles and possibilities of using infrared thermography in the early detection of lameness in dairy cows. key words: dairy cows, hoof lesions, infrared thermography, lameness

The aim of the article is to find out differences in the perception of selected factors that determine the business environment among selected groups of small and medium-sized enterprises (SMEs), divided according to the sector of the national economy they belong to. The first group included SMEs from the sector of transport and services. The second group included SMEs from the construction, manufacturing and agriculture sectors. The questionnaire was completed by 459 SMEs in the Czech and the Slovak Republics. To evaluate the formulated hypotheses, the Chi-square test and the Z-score were used. The case study showed interesting findings. The SMEs in transport and services perceive the competitive environment as more acceptable than the SMEs in construction, manufacturing and agriculture. In addition, the SMEs in transport and services are of the opinion that customers accept prices of their products and services to a greater extent than the SMEs in construction, manufacturing and agriculture. There are also significant differences between selected groups of SMEs in assessing the quality of the judicial system in commercial law and the view that the current level of macroeconomic indicators supports entrepreneurship and creates interesting business opportunities. The national economy sector is not an important criterion in assessing financing, the family environment, R&D infrastructure, the quality of the business environment or the quality of education. The paper brings interesting findings and new incentives for small and medium-sized enterprises; for organizations supporting the business environment; for further research and discussion on the cross-sectoral assessment of the business environment quality and its important factors.