When you are raising these, you are going to need milk within the first 4 hours after it hatches. After the first milk feeding keep milk around for imprints but If you do not care to imprint then time how long it takes for the wyvern to drop one whole food, multiply their current food by the seconds it takes to lose one whole food, and then divide by 3600 and you will have the hours until starvation. For example if it takes 10 seconds to lose one whole food to start off and they have 2400 food you will do 2400x10= 24000 then 24000/3600=6.7 hours. The time to lose 1 food will not always be 10 seconds as it increases as they grow so you will have to keep timing it throughout the process.

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