She does okay if we are in the house or the front yard. As soon as we get past the front yard she sits and drags her feet. I found her on the side of the road. I took her to the vet and they said she was 9-11 weeks old. They said she was a healthy Catahoula puppy. We found her the first week of Feb so that would make her 8-9 months old. I would love to take her places with me but she hates the leash and every time we do go in the car she throws up. She seems to be content on staying home. She is very protective of my 3 yr old son. What can I do?