The club owner has rejected an £800,000 bid from Sunderland for the striker but admits it's unlikely to be the last offer they receive.
"We invest substantial sums in the Academy in the expectation of producing players like Jon, who is capable of doing well at the highest level," said Davy.
"It is our intention to do the best for him and the best for the club and, were we playing in the top divisions ourselves at the moment, then the prospect of him leaving the club would be an absolute no-no.
"We are embarking on a long journey, however, to get back to those divisions and while we are confident of achieving our objective, we delude ourselves if we imagine there are not going to be approaches for our talented players like Jon.
"That means we have some difficult decisions to make and, while we would prefer not to have to make them at this stage, the board are unanimous in their desire to do the best for Jon and the best for the club.
"We have put down a strong marker to clubs as to what is not acceptable money for him, and that's where we are at this moment in time."