Nottingham Forest will be appealing against defender Chris Cohen's first-half dismissal in the 4-1 defeat at Leeds. The game turned in Leeds' favour in the 35th minute when Cohen was shown a straight red card for his lunging tackle on George McCartney in front of a furious home dug-out.
Forest have now gone eight games since a win and have slipped out of the play-off places.
Forest boss Billy Davies said: "I've spoken to our chief executive, Mark Arthur, and we're definitely intending to appeal the red card. Definitely.
"We've seen the DVD and the referee said it was for excessive force, but I agree with our chief exec Mark and we'll definitely go to appeal and see how we get on."
The Forest bench clearly felt Simon Grayson's furious reaction to Cohen's tackle helped sway referee Halsey's decision.
Davies played it safe, saying: "You decide for yourselves. You don't need me to tell you. We all know what took place.
"I said last week it (promotion) will not be decided until the last two or three games and you're better being a lucky manager than a good one at this stage of the season.
"Promotion will all be decided on refereeing decisions, suspensions, injuries and Lady Luck.
"We did not deserve that. Did we look like a side lacking in confidence? No. Did we look like a side that didn't have a work ethic? No.
"They worked their socks off and I'm very proud of what my players gave us. You can't legislate for certain decisions that take place."
Leeds boss Grayson felt Halsey was correct to send Cohen off.
He said: "The referee got it clearly right. I know Chris Cohen and he's not a malicious player, but he left the ground two-footed, caught George McCartney and the ball. It was the right decision.
"If it had been one of my players that had done that I would have accepted the decision.
"It was a reckless, not malicious challenge and the decision was correct."
Grayson agreed Forest had caused his side plenty of problems before being reduced to 10 men.
He added: "They are a good side. You only have to look at their bench, the budget they've spent, they should be favourites for the division and they're going to cause problems.
"We had to be patient and move the ball around, push the two wide players further up the pitch to create space for our full-backs.
On David Kelly's snub at the final whistle, Grayson said: "If somebody doesn't want to shake your hand that's up to them.
"I'll always offer my hand to anybody, win, lose or draw and if people refuse it, then that's their problem."
