I'm no rottie expert, Jada has only been with us for about 6 months, but she does the exact same thing!!
She just "talks" to us when we're petting her--the more we pet or scratch her, the louder she gets. Especially when I find that sweet spot where she loves to be scratched, right behind her ears.
My Jada is a mad licker too--always licking my 3 other dogs, and us, and the furniture, the floor, whatever she can.
She's not much of a barker either, only when she hears someone outside, or a strange noise.
Welcome to Pet Talk!!
I hope you stick around and show us pictures of your rottie!!
And good call on reporting that "trainer" to AC officers--hit your dog with a broom? Idiot.
Emily, Kito, Abbey, Riley, and Jada