The 24 year old joined the Millers on Monday, but is already impressed with the competition amongst the Millers strike-force.
"Competition breeds success, We are all going to be driving each other on and whoever gets that shirt will have had to have worked really hard for it." Keiffer told themillers.co.uk
"I think I'll learn a lot from this move. Everywhere you go you always learn something. I'm looking to improve my game here, this is another step in my career and I am excited about what we can achieve next season, and the competition for places will be a big part of that.”
"It was a tough first few days but I am fit and I know I can do this, This is a process for me to get the fittest I can possibly be. I believe to achieve that I have come to the right club."
"It is more mental than physical. I think as long as you know that you can push yourself, then you can achieve anything. It is a test of your mental attributes just as much as your physical attributes."
"I can't wait for the new season. I am really looking forward to pulling on the shirt in a competitive game." he added.