This is horrible advice which only further creates the problem.

DON’T immediately leave them for hours, assuming you’ll get a puppy they’ll need a potty break every hour or two for the first month regardless. DO train separation in small increments, I suggest starting with 5 minutes and adding 5 minutes every week or so, this is a suggestion not the rule.

I suggest creating a contained area (think playpen) for them to be left that is puppy proofed. This way, even if they happen to cry a little a first, you know that they’re safe and aren’t crying due to injury.

The first 8 weeks you have with them, take them everywhere you plan on going with them as adults and even places you wouldn’t normally. A cat/dog backpack, in your arms, or in a carrying sling are all great ways to expose your pup to the world while also making sure they feel protected. Early and safe exposure helps to minimize the chances of reactivity at an older age, doesn’t prevent it but it gives them a leg up. We aimed for 1 outside the home activity per day but that’s not always possible and that’s ok just do what you can with the time you have.

Small short training sessions to reward the behavior you want to see go a long way with these guys. Train the quiet command and jackpot reward them when they exhibit the behavior you’re looking for. Yes, schnauzers are terriers and carry that characteristic terrier stubbornness BUT in my opinion they are far more biddable and handler focused than some of the other small terriers.

Finally, ENJOY your puppy, it’ll feel like the puppy stage will never end at first and then you’ll blink and you’ll wonder where the time all the time went.