You would need a dog breed specifically bred for catching rodents and small animals. You'd have the best luck with a puppy and it would take a lot of training. With puppies especially it takes a long time and a lot of effort, but the results are worth it.
Puppies are puppy brained for quite some time and so you have to be patient and wait for their brains to mature before expecting them to be safe out with the flock unattended (ie. watching out for predators and pests rather than chasing a chickens because it got a fright and the excitement was too much for your pup to handle).
My next dog will be something I can use to catch rodents, but with all of our other animals it will need to live in harmony with I know I'll have to get a puppy and socialise and train it well.
Puppies are puppy brained for quite some time and so you have to be patient and wait for their brains to mature before expecting them to be safe out with the flock unattended (ie. watching out for predators and pests rather than chasing a chickens because it got a fright and the excitement was too much for your pup to handle).
My next dog will be something I can use to catch rodents, but with all of our other animals it will need to live in harmony with I know I'll have to get a puppy and socialise and train it well.