How should you tell the owner their puppy needs formal training?

I've been walking a husky puppy for a couple months now regularly. She four months old, growing like crazy. She's hyper, lives in a town house, so from what I can tell, she does not get much exercise or stimulation outside of when she walks with me in the afternoons.

She's boarded at our house three times now and the first two times were fine. She's a puppy so her energy level was nothing out of the ordinary from what I usually see. We have a huge yard so she was able to expend some of that craziness. This last weekend was a different story. She was a PSYCHO.

She would NOT stop barking. She was constantly swatting at my other dogs with her paws. One of my dogs usually plays with her but this time he was just not with it. She's too rough. She went after my oldest dog who, who is pretty passive but grumpy, and it caused an all out knock down drag out. She busted out of her mobile crate her dad gave me. Flipped it over and busted out the top zipper. She kept us up all night long barking, whining, etc. I took her outside in the backyard a total of four times between 11:00 pm when we went to bed and 6:00 am when we just said screw it and got up. And then she still pooped in the house that morning - TWICE.

I called her dad at 8:00 am that morning and was just like "my dogs have had enough. she's too rough. you need to come get her." Not my exact words, but that was the gist.

9/10 times, she's great with me. She's just a puppy. But she's at an age where if he continues to let her act a fool, she will, forever. I also think that she's going to grow so big she won't be able to even board with us anymore - and I'm honestly ok with that. Our house is small, so we only take in dogs up to 40 pounds considering we already have three pups of our own.

I REALLY think this dog would benefit from some sort of formal training. I honestly do not think he has time for her or knows what he's doing. At our first meet and greet, I could already tell this has to be his first dog, or at least first dog he's had on his own. I remember her saying "this is her couch she can do whatever she wants to it" and just thinking.. she's about to walk all over him. Has anyone ever experienced anything like this? What's the best way to tell a client their dog needs more than what I can offer? I'm not a formal trainer. This is just a side hustle for me. If you're paying me to raise ... (more)