Dear Cesar, My dog is a 5-year-old dog, a lab terrier mix, and has always loved going to walks, but lately he seems disinterested in going. I’ve had to pull him out of the door to go for a walk and then he’ll sit down after we’ve gone one block and refuses to go another. Even if I force him to keep going, he’ll pull me back another direction towards our house. I was so concerned that I took him to the vet. They did a blood panel on him, specifically to test for thyroid function, and he tested perfectly!