How many animals do I need to be considered a farm?

Good day, I'm curious about the definition of a farm in terms of the number of animals required. Specifically, I'm wondering how many animals one would need to possess in order to be officially considered a farm. Is there a set threshold or is it more of a subjective determination? I'm seeking clarity on this matter as I'm considering venturing into the farming industry and want to ensure I meet the necessary criteria. Thank you for your time and assistance.