After the sale, the cattle I bought traveled about 400 miles. It was most definitely cooler North of here. I think it was in the 60's when I left and it might have been the mid 40's in Mexico with a good breeze blowing. The cattle rode in a trailer that had one or two slots open at the top. When the arrived they looked fine. But after a few days, the youngest one seemed to develop a snotty nose, but continues to eat and seems to feel OK. I guess I would call this a shipping cold from the stress and the long ride in cooler weather. At what point do I need to doctor them? They act as though they feel OK and they still have a big appetite.