I have been doing the same thing, I have a herd of Lox in a biome that has meadow, swamp, snow, and black forest all with in a minute run of each other. They have knocked down every tree, they kill swamp creatures (very effective against the big swamp mob but they are poor against the oozes/poison). They have trouble with the Drakes but mostly because the drakes spawning on a spiral mountain (I could mine this down to reduce that issue) I only feed the ones in the swamp now, and only if I see their life is getting low. I try to avoid being at my base to long because of the shear amount of murder that takes place outside my windows. If I need leather, or meat, or any other materials I can run around and collect it from the Lox kills. I also have a Lox farm in the plains and used them to help me bring down the plains boss, and farm plains materials.

I don't understand people who say drop stacks of CB. Every time I do, they eat for the first day and then just leave it and don't go back the next day unless I pick it up and drop it again.
Down side of Lox farming... they really want to get into my house!