Premier League - Agent: Barton decision 'suicidal'
Newcastle took the unexpected decision on Monday, seemingly in response to a series of critical comments made by the player about the club's hierarchy on Twitter.
It has been reported that Barton, 28, also became involved in a row with manager Alan Pardew following a friendly defeat to Leeds United at the weekend, convincing the club to cut their losses on the controversial figure.
Speaking to talkSPORT, McKay said said: "I think it's a wee bit suicidal by Newcastle because how would you let your player of the year leave on a free transfer, approaching his prime?
"There will be a lot of takers. Joey would hope to go to a top club and in actual fact a couple of top clubs have been in contact already.
"There won't be a problem finding Joey a home."
Barton revealed on Twitter on Tuesday morning that he had been told to train alone.
He tweeted: "Made to train alone today, how predictable......."