I Just Bought A Westie And A Scottie Pup.both Female And 3 Months Old.i Need Some Help From Anyone?

I bought a crate for them wanting to crate train them to be housebroken.The scottie has been doing well but the westie is way beyond anything.I m feeling very frustrated cos she would poo and pee in her crate,even I took the advice from the vet to make the space so small that can only contain the pup herself. The scottie would never soil her crate,despite she has a bed inside.Every morning when I opened the door,she would go straight to the paper to get things done.But never the westie.She even eats up the poo whenever she sees it.I dont know what more I can do..6 days already and every morning there would be a bad mess inside the crate and she lying on it,which means I would have to bath her daily.Please help….