Has anything changed? ..Like a new pup,a baby etc? Mostly they do this to get attention

Lady was 100% housetrained right up until we got Jess..then she started peeing and pooping everywhere.Its been 8 months since then and she still does it,infact,she will not use her pads at all.
Weve tried absolutely EVERYTHING,but nothing works.Lets hope your friends yorkie is just going trough a phase and that soon her house will be imaculate again