Budgies can be really big brats. Mine have there own cages but some times they do sleep together. Mine me, mine get along great, preen,feed, pay together and even nap together. Last two nights they all ended up in 1 cage together. Tonight i made sure they were in there own cages.
The tiels can be big brats to. There are point when peek gets a little to close to hugs and hugs tells him to back off with a little hiss. If that doesn't work its a full out beak open chasing attack lol. Hugs will go with this so called attack it up to peeks face and then its back to normal. No one gets touched. Its like this i'm bigger then you so run thing.