I brought in a wild eastern cotton tail rabbit 2 days ago and I can't keep it as a pet. I was wondering if I keep it until it grows a little bigger that I can release it back into the wild where I found it? Or would it domesticate by then?
If it's healthy, I would take it back to where it came from as soon as reasonably practical.
Domesticating a wild animal as cute as a rabbit is a nice romantic thought, but in reality, you're running the risk of bringing whatever diseases the animal has into close contact with you and other pets.
And if it's an adult, you may not be able to tame it enough to be petted. If it's a young animal, then it obviously needs its parents.