Boyd is on his longest run without a league goal for the champions and has not found the back of the net since a penalty against Hibernian on February 14.
He said: "I've got a fair bit of sympathy for Kris just now. He came back from his injury and got off to a flyer in terms of scoring against Motherwell, Hibs and St Mirren.
"But he never got back to quite the same level as he had been at before his operation and that hasn't helped him much.
"To be fair, I think his own form goes hand in hand with the fact the team hasn't been playing terribly well either.
"Over the last month or so, we've not been at our best and we know that so it's a bit unfair to highlight Kris' situation.
"If we aren't making as many opportunities as we perhaps were five or six games ago, Kris isn't going to score nearly as often."
Miller has every faith in Boyd to hit top form again soon and sees no reason why he cannot bring his tally to 30 for the season.
He told Rangers News: "Regardless of the fact he's only got two penalty goals in his last 10 games, he still has 24 for the season and that's what we should be focusing on.
"That's still a great return and with six games left to play, who is to say he won't push on towards the 30 mark?
"If we can get ourselves sorted out and make more openings for Kris, I've no reason to believe he won't finish things off the way we know he can."