So-so sorry you lost your Penguin...I know the heart break. I lost three chickens this year: my #1 rooster 3 year old, "Bumni" died from sudden death in January, then my 2 year old hen, "Nutmeg", died in the Vets arms. Finally, my hen "Inky" was taken by a bobcat, from my patio, I couldn't save her. I raised them all from chicks. I still tear up when I think of them. But, two other hens were cured from their illness this year, one had a deadly internal infection. The other a hernia and congestive heart, I was told she would die soon. But, she has made a full recovery! That's the way it goes with animals. They can't tell you it hurts here or I cut myself there. Sometimes, by the time you notice a change in their behavior or appearance it is too late. And, sometimes things just work out. You will learn, and do better for yourself and your pets. Yes, now you just move forward and focus on your other pets that need your help. A wise doctor once told me, "you can't fix everything". Being a type "A" personality, I didn't accept that. But, now, I understand what meant.
Peace to you and God Bless.