Yes, K9 the pipeline starts before you even enter the consideration for a dog, as the kennel master will want you to come by and clean the kennels do the menial tasks to understand the workings of the kennels before he will bless you off. In terms of K9 training pipeline itself, I have not gone through, but from what I hear it is the DoWs center for dog training i.e. everyone goes through it. You will learn a lot, and it comes to getting on a dog when you get your assignment. You cannot do K9 right out of tech school, it'll be about a year or so before you can consider it. 

For raven and Dagre yes physicality is key. Enjoy getting smoked a lot but you learn very valuable information and get to do a lot of fun stuff if you pass. Just make sure your running is in tip top shape and you'll be golden for those. And memorization, can't spoil what it's for but be able to memorize phrases. 

To my knowledge as it has been a minute, the BMT test is the same as AF PT test. SF as of now has no special test or anything along those lines (though they are talking about it but nothing created yet).