Step 1: See Oncologist and take their advice.

Step 2: Definitely don't take internet advice. Disregard the following.

Step 3: Hit the gym

Step 4: Intermittent fasting + 50% fat, 50% protein diet.

Step 5: Ask doctor for a standard run of Fenbendazole or Mebendazole

Step 6: Play with them as much as possible.