Hi Mistari...sorry about your chickens being supper for a preditor.
I purchased an 8x10 chain link dog kennel for my hens. Covered it with canvas on the outside, to keep the wind and rain off them, have the top covered with tin. I made them a 16x16 chicken yard, out of hog panels, and covered all that with chicken wire. I put bricks on the inside and outside of the chicken yard and around the coop. If a preditor tries to dig under, the brick will fall down in the hole, and make it difficult to dig in....if it does make it through the first brick....there is always the second brick to fall in the hole. So far, I havent had anything to get in my chicken pens or yards, and I've had chickens for 3 years now. I have seen where something has tried to dig under, but apparently gave up?
I used to be able to let my chickens free range, but have had to keep them put up, as there are too many preditors around, and everytime I let them out, I lost a hen. There are coyote, fox, racoons, hawks...owls....just waiting to prey on my flock.
I take very good care of my girls. I just love chickens.
Hopefully when and if you decide to get more chickens....you can have a good sized yard for them to roam around in....and wont have to let them out, and wont run the risk of forgetting to shut the coop up.
I really do hate that I cant let my girls free range....but I just cant take the risk of them getting ate by something. I know they miss free ranging also. But...I pull grass for them and throw in their yard, and when I took our garden out, I basically pulled tomato plants one at a time, and threw in their chicken yard and they totally cleaned the leaves off. I have a large chest freezer full of garden vegetable, and scraps from cleaning the veggies for cooking, or canning. I save those, until winter comes on good....then I take stuff out of the freezer, let thaw, and throw it out to the girls....they really love it. I also cook them cornbread every other day, and I add lots of good stuff to it...like goats milk, and a little ground up egg shell....put in fresh eggs, and some corn chops. They love it.
I've also purchased live traps.....all I've caught so far are stray cats.
Hope something I have said will help you, when you decide to get a flock going again.