Cow with a wet noise

I have a cow with a wet sweetly looking noise, she doesn't seem like anything is wrong, eats & drinks good, I just noticed it today. The other 3 younger ones  also have wet noises, I never noticed it before, could this be a sign of something starting to be wrong ?? 

 

I don't have a head chute or any way to give then a shot, is their any feed-able antibiotics ?

 

Thanks, Chris

Cow with a wet noise