I'm so sorry for your loss. It's never easy to lose a family member. Now your sole focus should be on the remaining pup. Be sure to thoroughly clean and sanitize everything in the house from top to bottom, wall to wall, as well as your yard, dog toys, dishes, bedding, crates/kennels, furniture, everything. Wash your hands with anti-bacterial soap and use a sanitizer after handling anything the sick pup may have encountered prior to handling the remaining pup. Make sure to even clean your garbage cans (inside and outside trash receptacles) and the location you keep them in. Thoroughly clean everything, and I mean everything. Shampoo your carpets, steam clean your personal furniture and bedding. If you weren't a clean person before, then at least for the next few years you will be, lol. You've even got to clean your clothing and your shoes. Disinfect everything from every corner and closet.
You didn't lose your girl, you just lost your turn!
"In this breed, there's no such thing as an expert! The day someone says they're an expert, they need to walk away from the dogs, because someone's going to get hurt. You should be learning something new every day." John Maynard-Circle M Kennels