one time, our grapes were about ready to pick. So we decided to pick them on the weekend as we were busy during the week. Comes Saturday, the grapes were completely gone, about 2-3 buckets. It was as though they were eavesdropping on us and beat us to it. I think they have an extended family to raid the grape vines. Grandpa and ma, papa and mama, auntie and uncles, and little ones too all work together.
put chicken wires over your pot. Or if you have thorny stuffs like blackberries vine dried up and dead branches from finger lime tree, i always save it up and put it on the top of the pot. Trust me, this works 100% , they won't dig the pot anymore.