The vaccine protocol for puppies involves starting vaccinations at 6-8 weeks old and then every 3-4 weeks thereafter until they are 16 weeks old. The reason I'm stating that is because you mentioned Dusty is 10 weeks old and you aren't sure if he's been vaccinated. I'd suggest confirming whether or not Dusty has or has not received any vaccinations if you able to, but it sounds like you are likely due for a visit to your local veterinarian for a wellness puppy visit (physical examination, vaccinations, deworming)... so given the concern about the bowed leg, I'd suggest calling to schedule for a wellness visit soon and mention you have a concern about his leg as well.
This could be something minor that they will recommend monitoring. They might recommend radiographs (x-rays) to evaluate it further. On the more serious side dogs can have what's called angular limb deformities, which can get worse as they grow without surgical intervention in some cases.
Start with a routine puppy visit to see what your vet things about the limb. Don't give any at-home pain medications, especially to a 10 week old puppy, and considering he doesn't seem in pain to you (although it's possible your vet could think he is depending on physical examination, so get him in soon). Dusty would be due for a visit even if he appeared perfectly healthy is the bot***** *****ne so get him scheduled.
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