Serious question.....I have never had a dog so dont understand the problems.She is a cocker spaniel and just follows her nose. If she gets a fixation on something, nothing else matters. She will just run off and eventually comes back when she is ready . I thought I lost her once when she did just that in the woods. She disappeared for half an hour and then just reappeared from nowhere.
If, as you say, the problem is because she is a Spaniel.......how is a dog trainer going to change her ?