You've had great advice.
I just wanted to add that Honey was about 10 months when the problems we had started with her - it was a lot of work, as there were behaviour issues from events outside our control, combined with a health issue we weren't aware of until T-Touch picked it up (bad back), alongside a predominantly working cocker going through adolescence.
We HAVE got through it... as long as you're prepared to put in the work (with Ginny, and your younger dog) I'm sure you will too!!