While averages here are thing to consider
Female usually shed 14 days after ovulation that would put the ovulation around May 2nd in that case.
Females usually start building 6 weeks prior to ovulation, that would put it at mid march.
You started pairing in April
In other word it a little too early in my opinion, doesn't mean something is not going (can't tell from your picture) but I highly doubt that they are going through a pre-lay shed.
Did you palpate your female?