Welcome to BYC. Glad you decided to join our flock. I'm sorry about the loss of your chickens. It's always so sad to lose some of our flock. I don't know much about Guineas (never had any), but I've had loads of chickens over the past 50 years. I would recommend getting some more hens, but would strongly recommend NOT getting a rooster unless you get a LOT more hens to go with him. The recommended ratio of roosters to hens is 1 rooster for every 10 hens. As they mature and their hormones kick in, too many roosters (or too few hens in your case) will become very hard physically on your hens; over-breeding them, biting and plucking the feathers from their necks and backs, battering them, and potentially, seriously injuring them. The only reason you really need a rooster is to fertilize eggs for hatching and 1 rooster can easily handle 10-15 hens in this regard. In addition, your hens will likely lay better without the stress of having a rooster around. Please feel free to ask any questions you may have. We are here to help in any way we can. Good luck with your flock.