1) I don't need a commercially available silencer. In the event of the end of days, I can make one in a couple of hours in the garage. And yeah, I have a generator that runs on natural gas, so the lights will be working at my place.
2) Assuming that domesticated animals will automatically pack up and become wild, flesh tearing beasts is a bit of stretch, to be honest. They are pre-conditioned to be around humans, so in the event that a lot of humans are dead, they are going to be looking for their initial "pack', which would be live, loving and caring humans.
3) I don't need to thin their herd to be effective. I can hit a couple of them from 100 yards or further out with one of my good sticks, and let them waste their time feeding on the fallen if I need to get through an area.
Beyond that, traps and snares would work wonders, especially on animals that are used to going to a prescribed location to get food. Bait and dump a couple of them swiftly with a small caliber like a .22lr, doesn't make a lot of noise, but that leads me to another question..
WHO am I hiding from? Because if it's the space zombies, I can tell you the animals are going to be the LEAST of the problem.
In the event it's a foreign invasion, well, a small group of like minded rebels can make a WORLD of difference in terrain they know well and are comfortable with.
Once we zap a few patrols, we can use their equipment and rations, not to mention their coms, to locate and procure more.
In the event of End of Days, worrying about small, formerly domesticated animals isn't really going to be much of a problem to be honest.
Where do I sleep? Any second story structure with a locking door and a choke point like a stairwell that I can barricade.
I think it's an interesting question, but I don't think it's something that truthfully, is going to be THAT much of a problem. Even in Bosnia and Iraq/Afghanistan, animals like dogs were well documented to be "wild" only to adopt a soldier or even a whole group of soldiers and become an officer "pack member". Worn torn, savage brutality or not, the animals remember what it is like to be a human's friend and require/desire to rekindle that kind of relationship, regardless of what atrocities have gone on around them.
Granted, some of them will need to be put down, but I don't see it as a huge problem.
No, Garden Gnomes and Circus Clowns on the other hand, that is a SERIOUS issue.