These foods can help with ratty sicknesses

NOTE: this is not a substitute for a vet. if your rat is sick, consult a vet right away.

• Soy can help prevent mammary tumors and decrease pain
  perception
  
• purple grapes have more cancer prevention phytochemicals
  than green
  
• Foods to help prevent strokes; recommended for older rats:
  celery, prunes parsley, oranges (no orange juice for males)
  
• Foods with antibiotic properties: banana, prunes/plum, garlic,
  tea, eggplant, raspberries, onions, mustard
  
• May have anti-virus properties: cranberries, prunes/plums,
  strawberries, onions
  
• Good for arthritis: clove, dates, ginger, garlic, fish oils
• For some health problems, notably congestive heart failure, a
  low sodium diet will be beneficial. The best low sodium diet is
  rat blocks. Fresh fruit and veges are okay but no canned
  foods. check labels on frozen foods and only use those that
  don't contain any salt as an ingredient. No dairy products,
  baked goods, processed cereals or foods, or salted foods.
  distilled water only
  
• Protective against cancer: broccoli, red/purple grapes, regular
  soy
  
  
• Chocolate is a mild broncodilator
• Sick rats need food that is low in volume and rich in calories:
  moist cat food
  human baby food
  cooked egg yolk
  live full fat yogurt
  banana
  avocado
  soya based human baby milk (can be used to make powdered
  baby food, porrige)
  nutrical (soft dietary supplement)
• all of this info was taken from Canadian Rat Mischief this info was written by Tamara.