Nottingham Forest manager Steve Cooper says a social media post by his club before Saturday's 1-0 defeat at Wolves "was not helpful".
Forest put out a picture of striker Emmanuel Dennis on the Molineux pitch surrounded by wolf cubs with the caption "playtime".
The post was deleted but not before it was shared by Wolves players.
After the game, Wolves responded with a post depicting a chopped down tree with the caption "playtime's over".
"I was asked about it in the press conference afterwards but I wasn't aware of it. Then I was notified about what happened afterwards," said Cooper.
"It wasn't a good thing from the club and it wasn't helpful.
"But it's been dealt with. The important thing is about learning from it."