How about freezing fruit and vegetables in ice trays. I keep hearing other people talking about it all the time. I'm going to try it out. Will your chickens eat watermelon and grapes? I cool down the fruit or vegetables for a couple of hours and give it to them. I thought my Buff Orpingtons were going to run over the rest of my hens yesterday. I started tossing cold blueberries in the coop and the buffs jumped and ran over anyone that got in their way!