Do any of you use some form of birth control for your cats? I have an 8-week-old female kitten. Due to geographical location, I am unable to get her fixed at this age. (earliest 5 months). she's also got 2 brothers. I would like to give her some sort of birth control to keep her from going into heat until I can have her spayed. I have researched some, and decided that I would never give ovaban to any of my cats. Are there any other alternatives?