This post was developed in partnership with Crane and contains affiliate links. Your baby will most likely have up to seven colds before their first birthday and there are more than 100 viruses that can cause them. So you’re not alone if you find yourself with a cranky baby with a snotty nose. How do you know if your baby has a cold? Colds typically start with crankiness that morphs into a runny nose or congestion. Snot usually starts out clear then progresses to a thick yellow or green goo