The Scot only moved to the KC in the summer from Dundee United.
"There has already been one or two with phone calls asking 'to keep me informed'," says Bruce, whose side are without a win in four in the Premier League.
"That's always the first stage. I had it with (Wilson) Palacios when I was at Wigan and then (Antonio) Valencia when he went off to Man United. And if this kid keeps performing the way he is then it might become inevitable.
"Look at Luke Shaw - he only played one year, didn't he? That's how crazy it is: £32million, you could buy the Humber Bridge for that!"
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