Asking a silly question but do you need to hea...

Asking a silly question but do you need to heat the meat and chicken meals for baby from a can or jar bought from the store??? Can you give it to them cold (straight from the jar), or does it need to be heated thouroughly and then cooled down??? I am only asking this as I know you should heat meat till its piping hot when reheating.....just wondering what others do?????? Thanks.... Unsure