Getting ready to go home from a short term living home. I was wondering if you can add things to the bottle,and how long is to long on feeding tube

just found out I have squamous cell cancer 11/11/14
stage 4 lower right jaw bone 11/21/14
stage 2 lymph node 11/21/14
surgery 12/30/14 16 hour. Removed lower right jaw. All lymph nodes from right side of neck,and checked some on left side. The margins all came back clear. Radiation and chemo next