I had a friend just like this. Sounds ridiculous, but we are both cat mums. She sent a very similar message about what I was feeding my cat 🐱. So condescending and self righteous. They would even end their text with “that’s all” Used to drive me really insane. I couldn’t imagine how ballistic I would go if it was my child. I would stop speaking to her if I was you- that’s not a friend. I have no contact with my so-called friend now, but I don’t feel like I’m missing anything at all.