I would not stress out about hip dysplacia right now. If he starts to show major signs (the two biggest and easiest to spot are the bunny hop run and pain/struggling to get up, especially in the morning). However, if you are concerned about HD, there are a lot of preventative steps you can take to help reduce the effects if he gets it in the future. Some goof things to do preventaively:
* Because you said that you want to check his hips when he is one, I am assuming he is still a growing puppy. The number one thing you can do to help his hips is the control his growth. If you feed a low protein / low fat food, he will grow slower, which will give his bones more time to grow and adjust to his size. What are you feeding him right now? If you are feeding him a regular puppy formula I suggest you switch foods because they encourage rapid growth. There are some brands who make large breed puppy foods that are designed for slow growth, and a lot of people go right to adult food for slow growth.
*Try and keep him on the slim side. The less he weighs, the less stress there will be on his joints.
*Have him build muscles to support his joints with low impact excersize (i.e. walking)
* Try to limit stair climbing and jumping while he is growing, especially if he has trouble with it
*You can use joint supplements, the most commonly used ones being glucosamine, condrointin, and msm. What happens with HD is that the ball and socket in the joint don't fit together the way they should, which causes the cartilage to wear away (like arthritis, which is why it gets worse with time). Glucosamine helps reduce cartilage damage, and reduce pain if the joint is damaged.
Beyond the HD, I would be concerned if he is exhibiting fear/pain when you touch him. Has he had a vet check to make sure he doesn't have a skin condition, or other cause? If he doesn't have a medical condition, you are probably mistreated by his last owners, so you should work on slowly building trust by approaching him slowly, petting him in small incriments, giving him treats, using lots of praise, etc