Upgrade your birds speed beacuse it has to be very very fast so you can out run all of the mature waverns and be very carful with getting the mother wavern knocked out to get the milk also be sure to have a back up bow or gun with you also bring a fellow tribe member it will make it much easier to knock it out.!!
I got a level 150 lightning egg and I was so excited to hatch the egg...that when I went to put the egg down I accidentally ate it instead. :( ps4 users: R2 ISN'T GONNA DROP THE EGG YOU'RE GONNA EAT IT LIKE ANY OTHER EGG. REMEMBER THIS. LOGIC BEFORE EXCITMENT.