What can be done to save our pets?

I just lost my best friend/companion "Chris" just a mo ago;( He was a 8 1/2 yr old long coat Chiuahuah, and one sunday, I put him out in the kenel for 2 hrs along with our ****z zu "Gizmo" to get air. He seemd fine! Just a little reluctant to go in the kennel, but with a lil coaxing, he went in. 2 hrs later I went out to get them, and there he layed, dead;( He was just at vet not a mo prior for exam and his rabies shot..all was fine. A long time owner of dogs, I have no clue as to what what wrong. The other dog shows no signs at all of being sick, so I ruled out anything contageous. I miss my companion/friend dearly... and sometimes weigh heavily with guilt, wondering if I could have done something had I not put him outside that day. I didn't have an autopsy done..maybe I should of..I don't know. But it has made me rethink more on the care of "Gizzy" during a pandemic..what I will need for her ect...I thought i'd put a 6x6 ft kennel we used for camping down in the basement for her...and would change paper on the floor as needed, so she wouldnt have to go outside. And have stockpiled 3-20 lb bags of food, treats ect as well.Anyone else have any other suggestions here?

One thing I am going to do for our pets is first, they all come in.  I am collecting newspapers for one - for the dogs to go on, and also I will use shredded newspapers in place of kitty litter.   I have some kitty litter but not enough $ to stock up on it. 

In case of evacuation:

Thank you for advices. First of all i won't let my cat go out.