Did anyone have the problem of tree shrew biting off the nep pitcher? I've been getting this problem and my nep hvnt been producing fully developed pitcher for months

. They like to target my N. maxima the most but less in N rafflesiana and N alata. I hag them up but they seem to manage to climb up to the pots and then bye bye to my pitcher. Have any suggestion to solve this problem? Getting really frustrated

.