I just wanted to let you know that I am a birthmother to 2-year-old twins. If you want someone to talk to, pm me.
As for finding a veg adoptive family, this may provide with some difficulties. Are you going through an agency? You can speak with your counselor and they could possibly help you find a vegetarian family.
Before you decide what kind of people you'd like to adopt your child, you should consider if adoption is really the right choice for you. Remember that as your pregnancy progresses you may change your mind. And after you give birth you may also have different feelings. So try to prepare emotionally for all these decisions and don't be too quick to agree to anything.
If you choose adoption, then you can think about what kind of adoption you want to have. Do you want closed, open, semi-open? Here is a good factsheet that can help you decide:
And here is a state-by-state guide for laws related to open adoption contracts:
Once you've decided what kind of adoption you want, then you can start narrowing down the agencies or individuals who can help match you with a prospective adoptive parent or couple who fulfill your desires. If I were in your position I would choose an agency that followed government guidelines and didn't have a bad record of fraud, matched my religious beliefs, that offered counseling, and had access to a wide variety of prospective adoptive parents from which to choose. I would tell them I wanted vegetarian/vegan parents and I'd make sure to remind them of that every chance I get.
Here are some more resources for you:
I wish you well with your pregnancy and your decision.
There are so many criteria that prospective adoptive parents have to meet in order to be considered, that your chances of finding them all met and having them be vegetarian as well are very slim. If you want to retain that much control over your child's diet, perhaps you should think about raising it yourself?
I don't think that's accurate. About 5-10% of the US population is vegetarian or nearly vegetarian. To put that in perspective, only about 2% of the US population is Jewish.
Many birth parents choose adoptive parents based on religion and/or ethnicity. I don't see this as significantly different.
I know this is long after the fact, but as a vegan and a birth mother myself in the past, I wanted to commend you on your bravery going through this whole process of seeking adoptive parents who share your values. I hope it all worked out for you. I am now on the other side of this pathway and looking to adopt children, so it is beautiful for me to know that there are birth mothers out there who are veg* and are interested in similar values in the parents they choose. Have a beautiful day.