My new kitties hate one another

Question
Hi,
I have adopted 2 male cats, one 11 month old tabby named Moose, and one 12 month old long hair black and white cat named Spencer. I didn't separate them, but rather let these 2 unbonded cats run free for the first several days in their new home. Moose was under my feet, talkative and very happy. Spencer seemed content to, and has become more physically affectionate in the last few days. Coincidentally, in the last few days he as also been beating up Moose. At least that is my speculation. Moose is terrified and keeps hiding. He is frozen with large pupils and won't respond to me when I call him. Once I drag him out (from wherever he is hiding), he will sit with me, but if Spencer is around, he is so scared he can't function. I read another "answer" here that suggested never separating them once they've been introduced. My fear is that Spencer is trying to eat Moose. Moose's soft little ears have deep purple spots that appear to be attempted puncture wounds inflicted by Spencer's teeth. Spencer clearly wants to be the only cat, but Moose picked me first, and frankly, I don't think I could give either of them up. I desperately want their union to work. Please help!!

Answer
Clearly, they have been introduced to each other way too fast. Also I hope they are both neutered males.  Assuming so, I will continue on..

First..you are supposed to keep each cat separated from one another. I can't give you specific time frames as it varies with cats..you will have to judge when it is OK to move to the next step by how they react.
Now the two cats are separated.. you should introduce the cats to each others scent. Do this by taking a cloth or sock (something like that) and rub the cloth on Moose..then rub the cloth a little on Spencer (transfering scents) and leave the cloth in the room with Spencer to get used to Moose's smell. Do this exact same thing vice versa leaving the cloth with Spencer's scent with Moose.
You can also do this with a few of their toys/blankets. Keep doing this method until both cats seem cool with it

After this.. you need to find a way for both cats to be able to see each other but NOT get to one another.
(Like if you had a screened in porch you could leave the door open and they can see each other thru the screen)
If your cats are declawed you can use a TALL pet gate or
inquire about something else at a pet store or fosterandsmith.com  Or perhaps one of them could stay in a large cage while the other can see him (if you do it this way, you won't want the cat in the cage 24/7..so you could bring both cats together for a short while with one being in the cage)   

Once they seem OK with seeing each other and don't hiss etc
then you can put them in the same room together with short, supervised visits. If it looks like they are going to start to fight, break them up. Don't push too fast or you will have to take a step backward.  Slowly increase the time... at all time supervising  When they are together..associate it with something positive - maybe bring out some canned cat food, tuna, or treats -- even catnip

There is also a product at petstores called Feliway. You plug it in (like an air freshener) and it releases pheromones that has a calming effect on the cat and tells the cat that this is a safe place.

I can't tell you how long it will take..could take a couple months or even up to a year. They may become best buddies, simply tolerate one another...or worst case is
they will never like one another and you will have to work around it.

note: cats form social statuses when they live with other cats. It sounds like Spencer has decided that he is the top cat. Are you giving more attention to Moose and babying him more? You can try giving preferential treatment to Spencer.. feed him first, pet him first, etc
reassure him that he IS the top cat