Ok, so multi-year breeding is fine as long as the girl is back to weight.
Good to get some comments on this, guess I'll have a couple extra girls that may be breeding again next year. From 5 last year (2 didn't lay), 4 this year (1 of 2 from last year didn't want to get back to weight), and to around 9-10 next year (IF I don't buy any more adult females this winter/spring). Not a bad start for 3rd year breeding bps.