So DD is on cows milk and has a great diet at the moment. Eats anything and everything.
The problem is for the last few weeks she constantly has a runny nose and a bit of a cough. Kind of like a congested sounding one.

Is this because of dairy? MIL keeps ramming down my throat that her kids didnt have any dairy at this age as it could lead to asthma and its the dairy causing her runny nose? WTF? Is that true? I thought they need dairy for their bones to grow, etc.

She never used to have a problem with dairy (ie, yoghurt and cheese). The cows milk and day care kind of coincided at the same time so am not sure which it is? Should I go back to formula and cut the cows milk out until the runny nose is gone?