if anyone participates in or gives reference to 'force-breeding' or 'force-mating' behavior anywhere on the CS forum, you will receive a board warning and possibly lose your RP posting rights. That means you can lose the ability to post in these boards at all. For more serious offenses or repeat offenses you may even be banned from CS.
It doesn't matter if both users agree to the act, it is not allowed to happen. So don't do it for any reason.
Your animal characters can still mate, as long as neither of them are reluctant or forced into it, and you shouldn't go into detail about the mating process as this is a family website.
If you see any posts which seem to include a "forced mating/forced breeding" act or something similar, please report the post right away by clicking the little triangle icon with an exclamation mark (!) next to the post, or PM a moderator. Your report will remain anonymous and will only be seen by staff members, so you don't need to feel embarrassed about reporting someone you know or RP with.