I'm boarding a GSP puppy that's about 9 months old. We did our meet and greet at a park and she got along amazingly with my 2 girls, (GSP/Collie and Chiweenie). Now that the puppy is in my home I've come to find out that she has 0 training and doesn't listen in the slightest. The biggest issue I'm having though is that no matter what I do she won't leave my Chiweenie alone. Every time my dog moves the GSP is on top of her, jumping and nipping at her. I'm afraid that she's going to hurt my dog but obviously I can't tell the parents that I can't have her now that they've left for their vacation. Any tips on trying to help things go a little more smoothly so no one gets hurt?