not sure about 'the certain animal breeds' bit , but I think it is about you proving you need to be there with your stock 24/7, for reasons such as tending an incubator or brooder , those sort of reasons.
Growing mushrooms used to be one avenue that allowed you to live on the land via an agricultural tie . I don't know if that one still applies , as so many people started doing it , there was talk of stopping it , but as I say , I don't know if they did .
Free range chickens is another possible one , not because they are chickens , but because they are free range and you can prove a need to be there for security etc etc. This would only apply to large scale business , not half a dozen mankie ex bats . You have to provide business plans for 5 years with a further 5 year projection, from what I can remember .
The usual thing with planning is , there are these loopholes about , until everyone starts using them ... then they change the rules .
Also remember that each planning area will be different to some extent or other . There are basic rules that they apply , but each council district interprets the rules differently . It also helps if your uncle is on the council , but that is another story !!! One thing to remember , never speak to the planning about a particular bit of land ... until you are ready to put in for planning , just keep it vague " if I had a bit of land ?" type of thing .
Hope that helps a bit .
cheers
Russ