I have 2 ex racers (greyhounds) and have the same sort of problem (Already been to the vets ones because of cats), i have been teaching them "leave it", and it works 8-10 times that they will not attempt to chase but just look. When you take her out on walks, bring some really smelly treats or favorite toys, when she gets worked up), distract her and get her attention. In time this should come natural.

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