What causes blue & red heelers to fight with each other? They are 1yr2mths & 11mths.?

Answer 1

Are they neutered?

Answer 2

Same gender? That makes it worse, sorry to say. They are both maturing. The younger one is the human equivalent of 13 right now, in junior high and with a propensity towards mood swings. By the time they both hit two, it should be worked out. Until then, the best thing you can do is let them work it out. It will help if you establish that you are the alpha over them. While asserting that you don't like their behavior will help that, training will help even more. Both dogs should learn to respond to your commands, immediately, the moment you say them. This puts you in a position of power, and when you tell them to stop, they're a lot more likely to listen.

Answer 3

Any herd dog needs to define who they are just like humans. I swear they are as smart. Unless the arguing gets out of hand, let it go. It is important in dog society that some one is boss.
If the arguing gets out of hand, then you need to step in and take your place as ALPHA dog. Bite noses when they fight. and judging your own weight carefully so you don't hurt them, you may need to pin them to the ground on occasions and growl.
I had an entire family of Sable Collies, I had to be the Alpha female, and still every once and a while, the real Alpha female still challenged me on who was boss.
Yes, then she got the Pillows and I slept st the foot of the bed!
I was tough, I drew the line on who got the blankets! No I am not kidding, herd dogs are a hand full to raise.

Answer 4

it sounds like they are both tend to be alpa dogs, so they are trying to battle it out to see who is going to be top dog around there.

If there is no blood shed/actual injuries let them work it out while being supervised. If it gets out of hand or doesn't eventually stop they will have to be separated.