Should a cisgender person have to disclose that they are vegetarians before dating?

Let's say a trans person, who is a meat eater, decides to date a cis person. Then they find out that said cis person has been a vegetarian behind their backs this whole time.

The betrayal. Suddenly it makes sense why the cis person never wanted to go to Wing Night.

Shouldn't being a vegetarian be something a cis person should disclose on the first date?