We have 5 - currently complaining as I haven't taken their scraps down yet!!!
2 x Isa browns (maybe 4 yo now? given to me when their owners had to move)
1 x black bantam - not sure exactly what kind (given to me when a friends Golden Retriever ate her 2 friends,
she must be at least 6 now)
2 x feral honey coloured bantams (given to me by a friend with property who had too many feral bantams running around her property). These ones are pretty feisty - the dog is scared of them!!! There were 3 of these ones but the smallest one used to just come and go as she pleased (over and under our backyard fence) and one day she didn't return
I like to think she found a home she liked better, but in reality I'm not so sure.
They all get along OK, with a definite pecking order, although I feel sorry for the little black one, as she is right at the bottom of the pack.