As someone who is a RAFP dog handler, I'll give you a little insight to this question. Like someone previously said, it would be good if you do ring the AFCO and badger them for information regarding it- it'll make you look keen, proactive and make you stand out. That said, there really isn't a lot online about becoming a dog handler. It's very hard to find any information unless someone at your AFCO has ever done RAFP dog handler work, which is unlikely as we like being outdoors, not in an office! Anyway, you join up to do RAFP so do 25 weeks in Portsmouth. Whilst you are there you learn everything that's involved with the trade and the types of area you may go into after you graduate- we have a lot of sub areas for example, GPD (general police duties), ATSY ( airport security) Protective Security, Dog Handling, TPS etc etc. You'll get loads of information regarding these and before you graduate, you'll get to pick 3 preferences of type of role (dogs, gpd, TPS etc) and location. It's not guarenteed you'll get your top choice, however let's say you get your second choice. You're not stuck in it forever! You can try every sub branch of policing throughout your career if you choose. If you don't like GPD you can do other things, likewise with everything else. Dog handling is amazing but you've got to put yourself out there and throw yourself into it! You don't need anything else whilst at training to do with dogs. I'd never owned a dog before so you certainly dont need any specific things to be one, just a passion. Hope this helps .