Why Did Piglet Decomposed Faster

On September 10th, 2017 a series of 10 dead piglets were put out in the morning. We then observed these piglets for the next 15 days to see how they would progress. We had a series of question like which piglet decomposed faster, how do flies find dead bodies and how the secession of insects were on the bodies that were hanging and on the ground.
First, one of the questions was on if the piglet in the natural state, the burnt one or the buried one would decompose faster. Originally I thought that the piglet buried would be the one to decompose faster. I thought this because of worms and other type of bugs would be able to eat them however, this was disproven. Accordingly the one to decompose faster was the natural piglet. The reasoning is that within the body farm is that on day 8 it was almost completely gone with very little bones while the burnt piglets’ bones were mostly gone.
Secondly, an additional theory question was if the naked piglet or the clothed piglet would decompose at a faster pace. My initial thought process behind that was that the naked piglet would be decomposed at a faster pace. And my hypothesis was correct because on day 5 they were both there and still fully flesh and bone, but, on day 8 the naked one didn’t have anything except some bones but, the clothed one only appeared to have
The way that this played out was that on the first five days it changes were very small. On day three the first started getting blacker and there were some red lines that appeared to be there blood go through out it. Number 4 was starting to have maggots form around the bullet wound. Number 3s knife wound started to get bigger in the stomach region. Then on day 5 the maggots were pouring out are the mouth region to presumably eat the insides of the piglet. Then on day 8 the knife wound was the one that had the least left out of these