Did Sai Baba ever pressure his followers who were vegetarian to consume meat?

No, the source material from Chapter 38 is very clear on this point. Sai Baba never forced or pressured his vegetarian devotees to eat meat. The text explicitly states that for those who had never had such an association with meat in their entire life, He would not even let them touch it. Furthermore, it says He never committed the "rashness of giving them a craving for it through the Prasad." He respectfully served meat-mixed food only to those who were already accustomed to eating it.