Possible Clues:

• It would turn your stomach to have eaten this for a change
• Metamorphose
• Mum got at to go in and change
• Undergo cellular change
• Change to another form
• Be silent about thanks, for a change
• Undergo (genetic) change
• Become a Teenage Ninja Turtle
• What a gene might do
• It might turn your stomach to have eaten this for a change