Use of rapid rural appraisal and cross-sectional studies in the assessment of constraints in smallholder cattle production systems in the western Kenya highlands

animal husbandry bovin cattle coacción constraints contrainte diagnostic rural rapide diagnóstico rural rápido epidemiology epidemiología explotación en pequeña escala ganadería ganado bovino kenia kenya medicina veterinaria médecine vétérinaire petite exploitation agricole rapid rural appraisal small farms veterinary medicine élevage épidémiologie