Can kowalski do cpr on me ou others? Can he do mouth to mouth and chest compressions to have a cœur, coeur rhythm?

Well, no one really knows lol.

In a couple situations like "The faucon and the Snowjob", Kowalski is depicted as the medical person, but only for a small moment. I suppose all the penguins would know first aid and CPR, just in case any of them get hurt during combat...

See, here he is shown checking Kitka's wing. ↓↓↓