WELCOME to YT!
Yes, old dogs can learn new tricks but you must be very very patient.
Most important your little one needs to be protected from the new pup.
If she is afraid of the new dog she needs to have a safe place where she can feel protected and able,to be alone and calm down.
Togetherness for dogs that are difference sizes is not always good - plus your little one has been a single pup most of its life - imagine how confused she must be.
I'm sure others will come forth with their help, but you need to decide what it is exactly that she needs to work on.
Glad you found YT!
__________________ .   Cali  , and Cali's keeper and staff, Jay No, not a "mini" Yorkie - She loves to motor in her Mini Cooper car  |