Lifejackets are made to turn a person face up if they fall in the water. PFD's are made more for comfort and do not turn a person face up, so if they do fall unconcious in the water they may be face down depending on the way they fall in. PFD's are more popular then lifejackets in this time.
I do not know how many kittens were on the titanic though i do know there were a large number of dogs on the titanic and its said there was a canary but i dont know how many kittens were on the titanic.
The captain told the crew members what had happened and that they must tell everyone to put on their lifejackets on (without telling them what actually happened). Then, almost everyone was outside trying to see what had happened, until it happened.