That said I think it's important to remember that eating meat is not about you or me, it's about the animals we are (not) eating. The animal doesn't care about our reasons. If you imprisoned a cat and some days you tortured it and some days you left it alone, the cat would not care why. It could not even understand why and causing it pain for one's own spiritual growth seems, respectfully, prideful to me. There is no ethical middle path between sometimes torturing a cat and sometimes not. Probably if you told your priest about an imprisoned cat you were sometimes torturing he would tell you to release it immediately.