I haven't read all the in between posts...but according to my breeder and my vet...with chihuahuas being so small...this 7 weeks can easily be extended out to 7 months...

I've been gradually expanding Listo's horizons..he is 4 1/2 months now and I did wait to take him out of our house until he had his last set of puppy vaccinations.

It helps that he LOVES people (strangers too) and is happy to socialize with anyone.

I've worked hard to treat him like a DOG and we have another larger dog here that has taken kindly to him as well. (this takes some of the pressure off me to entertain Listo!)

Anyway...don't stop the process if/when your dog is beyond 7 weeks...you can socialize at any age...it just takes longer/more patience.