Some of the shaking can also be because they are cold very easily. But yes, I would also be nervous being around people who could break my bones with a small misstep.
This is something that in hindsight would seem to be obvious, but really isn't. If you've spent almost your whole life weighing 100+ pounds, it's really hard to imagine the rapid heat loss that is experienced if you weight 1/10th of that. This applies to pets, but also babies and small children.
I always looked down at people whose dogs wore sweaters. I thought they are just wimps. Now we have a chihuahua and she is wearing sweaters when it's below 75.
absolutely the same story here, 76 in our case :) - very thin coat. I remember reading story about a small dog where "having outfit for each season" was mentioned as a kind of outrageous pumpering of the dog, and how i'd had agreed with that before having our chihuahua. Now we have sweaters, light and heavy, jackets, jackets with hood - the hood goes on when windy, still trying to find good convenient pants, tried boots - shakes them off, it is ok, anyway we aren't going in the rain :)
I carry my dog in the rain or when it's too windy while she is wearing a rain jacket. My tough guy image is definitely gone :-)