Muzzle is on per my post above. No the care center hasn't concerns, why do you?
I have never seen so many nervous Nellies. For the record its Assisted Living and they bring dogs or puppies in all the time without issues.
I just want to add that I am 74 years old and I may be new here, but I am on many, many different Forums and User Groups. Plus I had a very successful working career not as a dog trainer however. I ran a Department when I was teaching full time the past 12 years, I was considered competent.
When I posted about the positive results of our dog / puppy visiting my mother in law I did not expect to be attacked with so many negative comments. Read back in this Thread and read the negative feedback and arguing about the use of the word No for Pete's sake! Gee whiz folks.
Just wanted to point out that there is not one uniform training point of view on this forum. It would be pretty dull if that were the case, and not really much of a discussion group.
It's quite unusual to muzzle a puppy. Young puppies encounter the world through their mouths, and I can understand people being concerned about possible negative effects of muzzling in the long run. I can also understand the opposite point of view -- that it's no big deal if used occasionally. I tend toward the second view, but only if the owner is able to read the pup's reactions accurately. Since not everyone is able to do this -- and not even everyone who thinks they are able to do this can do this -- it's not an "attack" for people to point out possible pitfalls to someone they don't know.
As for discussion about the word No, well, a lot of people are on these Boards because they are very interested in dog training and enjoy considering and discussing the fine points of it. To some people that's like discussing how many angels can dance on the head of a pin -- a total waste of time. To others, it's part of working out how they can develop their training relationship with their dog to the max. One of the most interesting things I've ever observed was watching Kent Kuykendall -- an accomplished trainer and handler of working sheepdogs who can put a dog where he wants it to be and make it understand what he wants it to do from hundreds of yards away -- work out with a dog their mutual understanding of the meaning of the whistle commands he was going to be using. Before that, I thought you just taught a dog what a command meant. But on that occasion I witnessed a feedback loop in which man and dog taught each other what they understood the commands to mean, and worked toward a common agreement. (ETA: For those who might be interested, a recent article in the science section of Wired refers to this phenomenon, and a couple of comments here on the Boards about that article are also worth reading.)
So please be patient with us. When people offer advice, consider it, and take what you find helpful at the moment and ignore the rest. If you're completely satisfied with the methods you're using now, nobody's going to keep you from continuing with them. If you're looking to find something that might work better, think about the suggestions offered. As d'Elle says, we are only trying to help.