When she didn't retieve over the obstacle I went back to a few straight retrieves and she done them, tried again and she backed off so went back to a few straight ones.
I know she's really young but I've just been making things fun like advised. Walking, retrieving, recall etc. I forget how young she is because she's retrieving well, maybe moving on too fast.
I've got a small piece of wood she likes retrieving with a strip of rabbit skin attached with a bit of elastic. That's really light so maybe try that tomorrow?
I'm away on holiday so the mother in law is having the dogs, she wil