Just got a new red tail boa male

[ballpythonluvr]

Boas normally won't hesitate to take f/t even if they've only had live before. Just make sure it's warm like you would do with a ball python. I highly suggest using feeding tongs.
A healthy adult boa is fine to eat one appropriate sized food item every 4-5 weeks. I judge based on girth, my boas that are 6' usually are on larges, but again it depends on their size.
Good luck with your new guy!

Thanks so much for your response. I was thinking that perhaps maybe he could take a bigger prey item and I will do just that next time.