Making quince cider. Do I need to remove seeds before milling?

[Pepper123]

I'm making quince cider for the first time. I have loads of quince so it is going to be a long process. I read online that the seeds can be dangerous in large quantities. Do I need to remove the seeds before milling and pressing?

 

[Maylar]

A local orchard adds quince to their hard cider pressing and they just toss them into the grinder with the apples. But they only use about 5% quince to the mix. I think they're bitter by themselves.