Territory Wars and also desire to be Number 1.
No, rats are predatory towards other small rodents. It would kill a gerbil.
If 5 Cats kill 5 Rats in 5 minutes that equals 1 rat killed each minute by each cat. So, in twice as many minutes the same ammount of cats will kill twice as many rats... 5 cats will kill 10 rats in 10 minutes. And if left for five times as long, which is 50 minutes, those same 5 cats will kill 50 rats. So obviously you will need twice as many cats to kill twice as many rats in the same time. So the answer is... You will need 10 cats to kill 100 rats in 50 minutes.
Well, if 3 cats can kill 3 rats in 3 minutes, that means each cat takes 3 minutes to kill a rat. So, if you have 100 cats and 100 rats, it will still take 3 minutes for all the rats to meet their unfortunate fate. Math doesn't care if you have a cat army or just a trio, it's all about efficiency.
Yes, rats, at least wild rats, are very aggressive to most other animals. Rats are omnivores, meaning they eat both plants and animals. So eat anything if they can capture it and kill it.
No, why would music kill rats?
Yes, cats can kill rats. Cats don't just kill only rats but they can also kill Mice.
Grabing rats by the neck and shakeing there head left and right ... Breaking the rats spine in seconds
Rats very much enjoy the company of other rats. Putting males and females together however will quickly result in over population. To introduce two rats take them to a neutral area away from their cages. Say a table or a bed or the floor. Let them sniff and touch for awhile and then after a bit put them away into the same cage. Rats do tend to play fight and wrestle alot..there can be squealing, as long as they are not injuring each other it is all normal.
Rats eat Robins, so no, they don't.
Yes baby rats can hump each other. There is nothing to worry about though. This is just called "bulling".
I don't think that rats eat each other.
Yes, mice and rats are both rodents and are related to each other. They belong to the same family, Muridae, but are different species.