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I would never let an intact 100lb male around puppies. Did you have a meet and greet?
Just out of curiosity, why did you accept such a dog when you have puppies at home? I own a White Swiss shepherd, he's 90lbs and neutered, but I would never allow him to be around puppies.

Hello.

I worked at my Local Humane Society and am still close friends with an animal behaviorist who now works for the ASPCA. PLEASE DO NOT EVER HAVE PUPPIES AROUND AN UNNEUTERED MALE! Very bad idea.😟

Personally, and the vast majority of my colleagues at the humane society, I’d NEVER recommend puppies or other adult male dogs to be around an unneutered male. They have completely different energy and pheromones that other dogs pick up on and it can go south pretty quickly.

Keep the puppies in a secured separate space. German Shepard’s (especially young untrained ones) are notorious for seeing small dogs, cats etc as prey. It just brings out their natural prey drive and overly excites them. Obviously not all German Shepard’s, but always better to error in the side of caution.

If their dog is jumping your dog, common at that age the dog is clearly untrained in play boundaries, I’d recommend a squirt bottle with water and saying “ah ah” at the same time you spray his feet right when he does it and be consistent. Works 90-95% of the time. It’s what we did during playgroups when we socialized dogs at the humane society. I always have one AND I highly recommend Pet Corrector, but only for really escalating behavior (like if your dog and this dog start to get into it or something bad with one of the puppies). It’s just a can of super compressed air that makes loud PSSSSSHHH sound. Don’t aim it at the dogs just near them if you have to break up a dog fight etc it’s awesome and only $10 on Amazon. It refocuses their attention off each other long enough for you to intervene (remove the offender or separate them for a minute). It does scare them, so it’s alwatys my last resort, and if you use it too much with the same dog they get desensitized to it like anything else (they’re so smart). I always explain to clients about it before I sit for them and show them what it is. My clients usually end up keeping one on hand after. It’s great for taking on dog walks incase you have an off leash dog who keeps approaching you and won’t back off or seems scary (hackles up etc). Great for dog parks too!

Good luck and feel free to pass along to this seemingly irresponsible owner.

I get requests from people that want me to board their cats for $10 a night regardless of the fact that I have 2 small dogs and my own cat. I do not board cats. In fact, I had to turn off all of my boardings unless a repeat client needs it for their dog but I have had people think that they can drop off 2 dogs and a cat without a meet and greet. I would rather send them to another Rover Dog friend and go do the cat visits.

Yes, it's up to you to keep all the pups & dogs safe. That may mean quickly trying to implement crates (and crate training) or an indoor playpen. Definitely keep a fully reinforced space between the pups and GS. That may require different rooms with closed doors when you're away,

I know this happened at the end of last year, but wanted to offer constructive criticism for any who face situations like these. As sitters, we know the Meet and Greet doesn't reveal the true nature of the dog, and owner-provided information can be anywhere from very helpful to misleading. That said, there are things we can do to avoid..or minimize issues... -One of the best things, IMO, is to be equipped and prepared to deal with the unexpected. Having to crate b/c of conflicts is stressful on everyone, and owners certainly don't want their dogs constantly crated. The best investment I've made are 41" high dog gates. I have 3, so that I can separate dogs if needed while giving them comfort areas to play and nap. Keeping dogs separated..and happy..can be a challenge but it can be done.
-Don't stress the owner while they're on vacation by giving them a play by play of what's going wrong. If needed, have a polite chat after the visit is complete.
-After an unpleasant stay, ask, 'what could I have done to prevent the situation/minimize it to make it manageable? Then use those answers for future stays. :)