Eldorado does litter box train and they were always very successful at it when I visited..I know they line the outside of the box with newspaper too..so I would make sure to do that also so she's as familiar with the process as she can be. I would suggest if you can't get her to start using it for pooping soon to just get her a coat and start outside. The longer she goes without pooping where you want her to the harder it'll be when you need to change it. Bad habits develop fast. I wish I started Oakley outside right away versus litter training. He always would pee in it but he wouldn't poop in it. He got very used to pooping next to the box on the kitchen floor and to this day prefers going on hard surfaces. I know it's hard to imagine potty training outside in this weather but you might be better off in the long run.
I'm not against the litter box, I also have an eldorado pup; I just know the entire process would've been easier and more beneficial to is both if I braved the weather and did it in the first plAce
