Did the Egyptians have some that didn't work out?

Earlier this week I started making a chicken mummy. And it wasn't my first! I made one a few years ago when Maya was learning about the Ancient Egyptians (pictured above). Now it is Jonah's turn. I thought I knew what I was doing, but something went dreadfully wrong this time around. I think I really needed to change out the salt on Day 1 or Day 2, but I hadn't read the directions carefully, and well, didn't get to it until Day 4 or so. By then, my mummy was a swollen, stinky, bulbous mess. It woke Brett up in the middle of the night. It made me almost throw up, just thinking about it. It made my dog stand and stare at the top of the refrigerator, wagging his tail for hours. He has been perky all week, sometimes sticking his nose up in the air and getting all shivery with excitement, sure that the eye- watering smells were destined for him. Jonah covered his nose whenever he walked into the kitchen. And Maya muttered nasty things under her breath.
I finally admitted defeat when I realized that I could smell it as soon as I got out of the elevator. If you poked a certain section through the ziploc it looked as though the pressure of putrefying flesh was about to explode. Everywhere I went in the apartment I could be sure to catch wafts of necrotic flesh smell. It was really bad. At the begging of my family members, I finally carried it to the basement garbage cans.
And I wonder, did the Egyptians ever forget to work on their mummies? Did they get busy and preoccupied and then realize, "Oh Shit, we let that guy ROT!" I guess we will never know, because if that ever did happen to them, the evidence is long gone. Those poor souls just decayed like pretty much every other human body that ever lived (aside from the relatively few throughout history who have been cremated or otherwise preserved). To their credit, mummies were generally made by priests, accompanied by much ceremony. I am sure they were more mindful of the bodies of their Pharaohs than I am with my cheap chicken whose circumstances of death I can only speculate at.
Anyways, in an effort to rid our domicile of THAT SMELL, we burned a huge quantity of sage. So now it smells vaguely of pot smoke on top of a rotten chicken. It is really great in here right now. You should come for a visit.