My porc. puffer is very shy around strangers. She tucks her tail and hides when we have quests over. When I am gone for a couple weeks and have my niece come over and feed, it takes Reba about 3 to 4 days before she will come out and eat while she is watching. I have had her for 2 years, she was about 2 1/2 inch's and is now about 6 to 7 inches. One of my favorite fish.
She is also having a hard time excepting the new tank, had 150 spring a leak, and upgraded to a 210. She grew up in the 150, she is finally after being in the new tank for a month starting to be her old self.
I have seen her puff up about 3 times. Just randomly, never stays puffed for very long.