That is what male Bettas do. He will only build another one if you remove that so why bother?
There is no need to remove them. The fish is building his nest and is ready to breed he will only make more.
NO!!!!! They should not eat betta fish...but if your cat has then call a vet, and don't get anymore betta Fish!
I believe you mean Betta fish. No, it should be fine. You can treat you Betta fish by giving them bloodworms!
Well, if you love your Betta fish, then it should live by itself. But if you add another Betta to your current Betta fish's tank, then they will start a fight because Betta Fish are Siamese fighting fish and if one Betta is in contact of another Betta, the possible reason would be a fight between them two.
If you want an active fish that moves around a lot then a Betta is not for you.
No it means they are ready to mate and might even have eggs in it if there is a female in the same tank.
Betta fish get in fights with fish with colorful fins and bodies. If your betta gets in a fight while your away,the weaker fish may die. But if you see your betta fight with another fish you should try to split the two fish apart [or all the fish that are fighting].
You should feed your betta 3-4 times a week.
Just leave it. If you really want to remove it you can, but it's just a sign of a healthy betta.
No betta fish are carnivores.
other Betta fish and the bigger fish.
Betta fish do not eat fish.