There are zoos who are only interested in nonhuman partners, and there are zoos who are interested in nonhuman and human partners.
The difficulty for those who want to have both human and nonhuman partners is that you end up living a double life before you know it. Honesty is important in relationships, but what will you do when you confide in your human partner about your other love interests, only to be met with horror and disgust?
Broadly, there are 4 scenarios here when you tell your partner about your zoo interests
1. Your human partner is interested and wants to join in
2. Your partner tolerates that side of you as long as you don't shove it in their face
3. Your partner is disgusted by what you told them and demands you to stop
4. Your partner is disgusted, ends the relationship and might use this knowledge to slander you all over town
Only by confiding in your partner you know what the answer will be, but once it's out there it's not going away. You cannot "untell" about your zoo life whatever the reaction will be, and that is why many zoos end up living a double life.
There is absolutely no judgement there on my behalf, as I have done the double life: dating while still trying to figure out my zoo feelings. In the end we broke up before I had figured it all out, but thinking back, I wonder whether I ever would have told her.