Quote Originally Posted by mattfish View Post
A healthy immune system is designed to destroy ANY foreign bodies that enter into it... That is a FACT
Yet people and animals with seemingly healthy immune systems succumb to illnesses- whether caused by bacteria, viruses or parasites- get very sick and still die. The immune system isn't faultless by a long mile, as amazing as it is.

Everyone who's commented on this thread is simply answering your earlier question: "Was it a good idea to feed my pixie a sparrow". You have your answers, and by a mile the answer is that it was not a good idea, because you do not know where the wild sparrow had been, whether it was clean and healthy and whether it was carrying any parasites or viruses. Pretty much a given that it had bacteria on it.

I would never feed any of my pets a dead wild animal, even if it had been frozen. My dog ate a freshly dead rabbit without me knowing until it was too late, and he got violently sick afterwards.

Just my two cents