Centre-half Collins was shown a straight red card for a challenge on Latics forward Matt Smith after an hour of the third-round tie at the City Ground on Saturday.
Reds boss Alex McLeish feels the decision was harsh, with television replays suggesting it was little more than a tangle of legs - and that the Oldham man was pulling Collins' shirt first.
"We did have an issue with the sending off, we felt that he was pulling Danny's shirt," said McLeish after the surprise 3-2 loss to the Latics.
"I don't know if Danny even touched him. The big fella (Smith) seemed to collapse like he had deck chair legs. It looked as if he made the most of it.
"From what I have seen on the video, Danny did not make any attempt to make contact with him. Maybe when he was dragged down by his shirt he did.
"But that is the big question. I would like to see it blown up. We will look at it, I would think that it is a decision that is appealable."