Did you cup them gently?
I went into the nether (Actually, I went... ON... THROUGH... THE NETHER... WE MUST GO... uhh sorry...)
Anyway, went in, heard crazy creepy shit... and BAM Ghast attack... fucker started raining hell and destruction on me, fireball put out the portal, had to relight it while I was on fire... got the flock outta there like a little girl.