Hi Betsy - Pictures of current set up? Went back & re-read your original post. What type of weather do you actually receive?
Also, what kind of chicks did you get? Bantam or full size?
As to using the dog kennel, there are many ways to do that. I agree w/ above - best to move it to the ground so they can scratch. My dog kennel would not support a wood roof directly (would need to do a free standing roof of 4x4 or 4x6 posts), But I'm a big fan of cattle panel & have hooped it over the top...
Here's a post I did for someone else. Post in thread 'Chain-link dog kennels for run?'
https://www.backyardchickens.com/threads/chain-link-dog-kennels-for-run.1572288/post-26902322
Depending on your weather, you can use the chain link privacy slats, tarp, shower curtains - instead of wood to create a solid wall. Someone on BYC even used bamboo, vertically - it was FANTASTIC! You still need smaller wire on inside of fence for security.
Many ways to attach your roosts or freestanding. Same w/ nest boxes.
I live in an area where I can do open air coops (moore/Harnett counties, NC). I love the hooped cattle panels for coops, runs & run extentions. They can be put on a wood base, a pvc base or no base at all (t-posts to hold in place). At bottom 2-3', use 1/4" or 1/2" HC. Higher, I use 2x4" welded wire that I put on inside curve. So far I've used tarps - when I didn't have 2x4 wire up & hurricane destroyed tarp(s) birds got out. Won't keep snakes from climbing & getting in (neither does 1/2" HC.
I had a lot of 8x8' coops I was using as smaller breeding pens (8) - then due to family stuff out of state, chickens were processed, sold or given to good homes. Last used in 2019. Didn't think to take tarps off or remove drinkers, feeders. To be used again now, they will need updating (some w/ smaller wire) , drinkers/ feeders (plastic 5 gallon buckets disintegrate in sun & heat over the years) & roofs. 4 were to have attached runs, but didn't happen before... would/could now.
They weren't fancy but they did work! They will work again.
Coops, cattle panel, sheds
I've learned that the "guide" of 4' in coop, 10+' run/chicken is definitely true! During Hurricane Florence, I combined chickens that were out in tractors & temporary grazing "paddocks" into the hooped pens w/ established flocks. During storm itself, they did OK. After storm, didn't take long - fights, chasing, feather pulling... just too small of areas for doubled/tripled #s of birds. The wet & wind kept me from putting tractors/ grazing pens in place & separating birds right away. BIG MISTAKE...
Hurricane Florence - 2018