[SomeRandomGuy]

It seems to me that the primary problem here is lack of communication and couple-based decision making. From what you describe, it seems that when you decided to purchase a house with her it was not your understanding that she would be brining in so many new animals. It sounds like she is acquiring new animals without first discussing it with you, which I would consider a major communication issue. The thing about these issues is they do not just go away.

Looking at this from another angle, what was her house like before the two of you moved in together? Was she allowing the same behavior of the animals there as she is now? If so, then you may have had unrealistic expectations of how she would allow them to behave in the home the two of you share. She, on the other hand, may have assumed that since you saw how the animals in her home behaved you were fine with them behaving the same way once you moved in together. Again, this sounds primarily like a communication issue.

My suggestion would be to sit down and discuss this with her fully. Tell her what you have told us here. Tell her how this situation makes you feel, and how you can't even have your friends over. Discuss how her taking these things so personally impact your relationship and ability to communicate with her. It may not be necessary to work out a resolution at this time, if you can at least discuss it and ask her to think about it. This sounds like a situation that is definitely going to require compromise on both sides. Right now it sounds like there is no compromise, she is getting her way and you are allowing it, although with much resentment. Finding a compromise that you are both happy with will require a great deal of communication.

I wish you the best of luck. Let us know how it turns out.