Lincoln is 17 weeks old, and is comfortable with my husband and 2 sons (ages 7 and 9). But when it comes to going for a walk, he only wants to go with me. When my husband or my mom go to take him for a walk, it's like trying to drag dead weight. Sometimes even if they have treats (especially if Lincoln can see me around).
Any tips or thoughts? I know he's attached to me, but I want him to be able to walk with others, especially as this is necessary for the AKC puppy test at the end of puppy class.
Walking on leash is a learned behavior, and it doesn't immediately transfer from one person to another. Lincoln is still VERY young, and it is perfectly appropriate for him to be more attached to one person. Puppies also learn at their own rate. You can't rush it. Just keep working on it, slowly and gently, with NO dragging!!! To start, you can have the other person walk beside you, with Lincoln between. Then when he is used to that, hand the leash to the other person and keep walking right beside him. Then start to vary YOUR distance from him as he walks, always coming back to him and rewarding him HEAVILY for walking with the other person. He'll get it eventually. But it might not be on your schedule, at the end of a 6-8 week class.
Incidentally, if the AKC puppy test requires that the puppy walk with a stranger, I wouldn't do it. I do NOT let people outside my family (or at least not very well known to the dog) handle my dog.
Added: I just checked on the AKC web site, and there is NOTHING about anyone other than the owner handling the puppy on-leash for the "Star puppy" award, and for the CGC (canine good citizen) the dog only needs to STAY with a trusted second person on-leash, not walk on leash with them. And Lincoln is FAR too young to be worrying about CGC.