Prong Collar introduction

Brownie arrived late yesterday afternoon after her owner and I spoke for a bit. She put Brownie into a kennel with a leash left on and headed out. After a few minutes, I took Brownie out for a bathroom break. While getting her out of the crate, she proceeded to growl at me, but that was ignored, and I went about my business of getting her out of the crate. That's why she remained on a leash because I wasn't sure how she would respond to me. She responded the same way each time I would get her out of the crate.
This morning, the same thing happened. She never tried to bite or anything like that, and she possibly was letting me know she wasn't too sure about me or her current situation of being in a strange place. I wanted to get on to a prong collar to communicate better with her. I wasn't sure how she was going to react, but whatever came up, I would just deal with it and keep moving forward. It wasn't the usual way I introduce prong collars. I always go by the dog and not a rigged protocol.
It may not have been pretty, but she didn't go crazy, and she seemed to be catching on. We'll see how things go from here, but it turned out better than I anticipated.