"It is good that the club want to renew their contracts but the biggest problem we will have will be in the summer when the vultures come and offer big money and try to get them," said Morrison to the CT.
"You know what young boys can be like, their heads could be swayed to go and play in the Premiership now.
"But if you go there and don't do as well as you should then it is difficult. I think they should all stay.
"Westy is probably at the age where it is the right time but I will be glad if he signs a new contract, but the rest of them they are young and should still learn their trade here because I have seen it before where youngsters go to the Premiership and it takes time.
"They want to play straight away and the manager doesn't put them in the team and they end up sitting on the bench and going mad every week.
"But here at Coventry they are going to play. They are four top players and I hope they do stay because we are going to need them next season to try to help us push on.
"The gaffer wants to strengthen in the summer and it will be great to add more quality to what we have already got."