Need help with over hyper dog! What do i do?

You’re right, this behavior is not OK. This dog is causing injury to you, posing liability by jumping on your neighbors and their dog, and also a major flight risk. It’s great that you already communicated with the owner.

Although I understand your reluctance to miss out on the income that was planned, I’d advise that the cost of possible injury to you and others is not worth it. If I was in your shoes, I’d ask if there is another option for this dog. After looking at your profile, I realized that this was booked as housesitting. In that case, I’d ask if there is another person who could walk the one dog (maybe a neighbor/friend/relative who knows it or maybe a nearby walker/trainer on rover). If this was booked as boarding & they lived close by, an option might be to see if their dog can stay at their home and you can go back-and-forth to feed it and let it out in their yard. Another option might be to see if the stay could be transferred to another sitter on Rover. In the past, if rover needed to transfer a stay and the other sitter charged more, rover absorbed the difference. Perhaps there is a sitter/trainer nearby, who specializes with these type of issues.

For a dog that is likely to escape their harness, I have attached a second collar with my cell phone number on a tag and attached the leash to both their harness and the D ring on my collar for double security. Normally with a hyperactive dog, the answer would be to walk them more and longer. In our heat wave, long walks, especially for that Brachycephalic breed, really isn’t an option currently. sometimes, it’s possible to tire out hyper dogs inside with an indoor ball or a toy.

BTW - Since you’ve already contacted the owner, I would suggest you might want to loop Rover into the communication, in case their help is needed transferring the stay of the hyper, injury causing, flight risk, liability dog to another sitter. If you do so, make sure that you include that the owner stated she’s always like this and very clearly explain the liability caused by this dog who is a major flight risk, escape artist, attacked your neighbor and her dog, and injured you. Rover will likely require written documentation from you and owner, but this scenario seems to necessitate that.