Muscovy are considered a nuisance, so i don't believe a store will sell them, However private breeders have sold them with no issue as long (from what i heard) you do not dump them into the wild. Dumping domestic ducks is where the fines come in. I might have to contact FWC to find out about the...
You have a few options depending on what outcome your wanting. You can try a re home, sell, trade on the forums here. You can try craigslist to sell or give away. The last option you can also try is a duck reserve near you.
Are your chickens/roosters going to be housed with your ducks or separate? I don't own chickens but have heard how drakes will try and mate with chickens and roosters might try to mate with ducks. Drakes will hurt your chicken hens when mating. Also there could be fighting, i have read stories...
Central, Florida here so far my horror stories are; 2-3 Years ago we got 2 ducklings and raised them until they were about 7-8 months. They were killed by what we believe a fox digging under our fence and taking their heads off. They were Pekin and free range 24/7. This time around I started...