I'm not the expert, but in my opinion, if it is doesn't hurt somehow people, why it should hurt pets? For example, I have a goldendoodle and before I took it I read a lot of information about the breed to know how to take care about especially this kind of dogs. Nowhere were written that water with electrolytes can be dangerous for them. So, in my opinion, it's okay for dogs, if you still have doubts, you can find some websites with more information. For example this one
https://petpls.com/do-goldendoodles-shed/, here i learned how to get rid of the hair everywhere.