Hatch 2 wyvs
Once your Wyv hits 400 food. (Which at minimum takes 2-3 hours provided you haven't hatched pure trash.)
Then go on milk run. Trap female, tranq, take milk.
Feed 2 to the 2 wyvs and pres bin the other 3 and use 2 3 hours later.
1 spare for imprinting.
Real basic.