If you currently have a rooster I would think no don't take him. Adding a rooster to a rooster is a whole new game.
There is a risk in bringing in new birds, but it is drastically reduced in the set up you describe. Auctions and swaps - make my blood run cold. However, the flock of birds that you are interested in have been in one place, and I am thinking a place where they did not have chickens before...I think you would be pretty safe without quarantining. IF you can't do quarantine right, well you are just pretending. I just got a new rooster in a similar situation, it was not a problem not to quarantine.
Mrs K
There is a risk in bringing in new birds, but it is drastically reduced in the set up you describe. Auctions and swaps - make my blood run cold. However, the flock of birds that you are interested in have been in one place, and I am thinking a place where they did not have chickens before...I think you would be pretty safe without quarantining. IF you can't do quarantine right, well you are just pretending. I just got a new rooster in a similar situation, it was not a problem not to quarantine.
Mrs K