Animals certainly Experience Pain and Pleasure. I think they probably do Experience some Emotions. A Machine is never going to Experience Pain and Pleasure with any kind of Existing Hardware. So by extension a Machine is never going to Experience Emotions with any kind of Existing Hardware. We first need to understand what Pain and Pleasure and Emotions are, before we can put them in Machines. There is a Hope and Belief by some people that somehow, with the right Software Programming, or just more Hardware Complexity, these kinds of Experiences will spontaneously pop into Machines. This is pure Religious Faith. When the Designers put Conscious Experience into Machines they will know exactly how to do it with new discovered and developed techniques. It is not just going to Magically appear without a detailed understanding of what they are doing.