Those females should have no problem putting on a good deal of weight between now and the time they start fasting unless you started your season really early. The 2019 may slug out though, so it's probably better in the long run to give her an extra year.
The male is really iffy though. There is a good chance that after the first pairing he goes off food for a while, and if he does, you probably should not continue trying to breed him. If he goes on a fast now and stops breeding, he will be fine, but if you continue breeding he will expend all that extra energy and it's really risky.
If it were me, if you haven't already started conditioning them, I would just start your season several months late to give all three of them a bit more time if you are really anxious to start and don't want to wait a whole year. Another 100-200 grams would make a huge difference for your male.
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