When I had my dobies, the females first trip was at 10 weeks of age, so you know she had no time for conditioning. She did great. Kept darting for the shade on a week long trip of 35-40 miles in length in the Sierra. She was stung numerous times by yellow jackets one day and took off crying, I called her back and brushed them off. Her dad bit or got bit by something and had a swollen neck/jaw, had to take him to the vet when I ended the trip a few hours early. I was offered some money for her when we were headed out.