I do like the idea that @townchicks mentioned, go up. The dog is a potential problem of maybe knocking down a stack of chickens.Thanks. They are not bantams. One bantam fella and 5 big girls. Lol the cat carrier is a medium size, so I might could fit 2 girls in it. I wish I could figure out a bigger space . I'm racking my brain trying to figure it out. Half tempted to barscade my bathroom. But that would be hard trying to keep them in with everyone using the bathroom.
I have a cage similar to yours that I use as an isolation cage or broody breaker in my run. I have had 7 large fowl (including a huge rooster) willing pile up in there - chickens are weird, so your 5 hens will do o.k. for a couple of days. I would put the bantam rooster in the cat carrier - he may get squished.