How do I determine the gender of the pigeon? Would I want to get one of the same gender, so they won't mate? Does that work? How do I stop them from breeding? Also, can I get a different breed of pigeon, maybe one of the cute little fancy ones (Guess who's been looking at pigeon pictures?)? Can you have different breeds together?
males will coo, dance, and have some green and purple shine through on its neck. The hens can have the same, but usually not as distinct. Hens are usually smaller than males,and usually quiter. It can take a bit of practice, but you will get it. I would recommend getting a hen, if at all possible. since we don't know the gender of yours, a hen would be better. As for hens will get along better than two males. And a hen and a male will get along fine as well.
As far as stopping breeding goes, you need to get some fake pigeon eggs and when they lay eggs replace the real with the fake. They will sit and when they don't hatch, give up.
Different breeds get along fine together, so go for it!
Would a 3x3 work? I'll have trouble springing for anything more. How much space do you need in the aviary? Again, I'll have trouble getting more than 3x3, at least that's not a prefab thing. I know that that really isn't a great amount of space. Could a pigeon be next to/near the chickens? Not in with them, but probably near them.
do a 3 by 3 loft, and then once you are able bump out a 3 by 3 aviary.

that's what i would do atleats.
The more space the better for the aviary.
Yes, there are very few diseases that pigeons can pass to chickens, and vice versa. so it is fine.
If you want a bigger loft for cheap, take apart pallets. They are free pretty much everywhere, and work great once taken apart. I made a 6×8 walk in pigeon loft 99% out of pallet wood. I pretty much had a new hobby for about six months,,, Taking apart pallets. But, if I wanted a coop, i was going I need to do it, so I did it! The total came out to be about $200 ...not to bad considering it's size!
The Windows were free out of a dumpster too!
