There is no reason for this, it may be because they are arguing over their teritory or food etc. it wont be beceause they dont like each other... Maybe they are just playing.. But what can I say, I dont really know your dogs.
2 female Bettas will not fight provided they are in a large enough aquarium.
they would fight over the female
Dogs cannot double-date of course. But 1 wants the female and must fight to get the female. That's the only way to see who gets the female. If they keep fighting you should get rid of the female or a male, or the 2 males..
When male and female cats fight, the more likely to fight each other would be 2 females if fixed, but more likely two males if they are not fixed.
jumpy i got 2 of them they fight alott, kinda picky
Yes they will. Hamsters and gerbils are solitary creatures and they wil fight if they feel that someone else is in their territory.
yes they will
Yes, 2 male wolves fight in order to become the alpha. The winner mates with the female, and they become the alpha's.
No two girls should be ok but two boy with a female around would fight
normal. 2 males can live together. so can male+female without mating. but get rid of one. they may fight to death.
you can't because they would fight and eat each others face to impress the female.
No I have two female gerbils (Minnie and KE$HA) and KE$HA is clearly older and they get along fine.