The study was carried out at Bogotá city, at a medium altitude of 2600 mosl, with temperature average of 14°C. A sampling was made in Polideportivo el Salitre, and another one in the Central Park of Modelia. The objective was to scan and standarize the physiological changes that appear in canine athletes, as response to the exercise made in Agility sport. Fifteen canine females of different races, of the schools of Atalanta and X-treme Dog Ltda were sampled. The control was obtained from individuals in rest, previous to the exercise, immediately to their arrival to the investigation area, where the tracks were located, and that, included the measure of rectal temperature, pulse, respiratory frequency and of arterial blood (femoral artery). The arterial sample was processed with portable sanguineous analyzer, obtaining hematocrite, hemoglobine, sodium, potassium, chloride, ureic nitrogen (BUN), glucose, sanguineous lactate, pH, carbon dioxide pressure (PCO2), oxigen pressure (PO2), carbon dioxide tension, (TCO2), bicarbonate, oxygen saturation (SO2), excess of base (BE), anion gap and osmolality. Then the training began so, that it simulated a real competition, where each canine passed four times by the track, and at the end the animals were analized, following the procedure for control samples. The results were compared pre and post exercise, appearing: increase for Temperature, respiratory Frequency, pulse, pH, Hematocrite, Hemoglobine, Sodium, Chloride and Osmolality (P<001); increase for Potassium, Lactate and Glucose (P<0.01); rise for PO2, SO2 and BUN (P<0.05); reduction for PCO2, TCO2, BE and Anion gap (P< 001). In summary, canines at Bogotá, had evidence of hyperthermia, tachycardia, hypocapnia, respiratory alkalosis accompanied with a compensatory metabolic acidosis and hemoconcentration by a dehydration classified as hyperosmotic, after an Agility competition.

The purpose of this paper is to made a retrospective analysis of skin neoplasm in dogs, which was found at La Salle University during a period of five years. This study was made with data’s given by the histopathology and diagnostic area of La Salle University located at Bogotá, Colombia. The register record has the following five characteristics: diagnostic, sex, age, breed, malice and tumor localization. The cases were grouped based in type of neoplasm to determined their characteristics and behavior of this pathologies. During this period accumulated 192 cases in total. The average age of the patients was 6,5 years, it was found that Boxer was the most injury breed with a 19,1% (32 dogs), following the Labrador with 13% (26 dogs) and Poodle with 15% (22 dogs); the males also was the most injury with 58% (108 dogs). The tumors that had the major incidence were the Mast cell tumor (26,2% in 2003 and 20% in 2002) and the Histiocytoma (12,3% in 2003 and 10% in 2002) the other neoplasm that appears in this study was the Lipoma, Trichoepithelioma, Squamous cell carcinoma and Papilloma.