I went through a very similar situation with my parrots. I hadnt lost any passion but the amount of time and energy that went into them was running my life. I never had time for friends or family. Between the diet, the exercise, and the training I was spending all my free time with the birds. I did love it, dont get me wrong, but if I decided I was gonna go out with friends after work, that meant that the birds didnt get out of the cage for that night. So then I would feel bad. Ulitimatley I decided to rehome them. I feel it was the best decision I could have made. All of them were taken to the same facility and evaluated. My favorite girl was put into the breeding program. From what I understand she fell right into place and was very happy being a mama. I think you need to ask your self how you will feel about your decision down the road. IMO if the passion is gone then it wount be long before you start to, and i use this word loosley, resent them for taking up time that you feel is better spent else were. If you decide to rehome them dont be afriad to ask the new potential owner even the dumbest of question. make sure you are confident that they will be taken care of properly. There is nothing worse than wondering. best of luck with your desicion.