The boost gives a 1 in 150 or a 0.667% chance for the first cub in the litter to be a jaglion. I did some math, and that means if you use all 20 of your boosts for yourself you have a total chance of 12.5% that one of the cubs will be a jaglion!
If you also use your side account, 40 cubs gives you a total chance of 23.5% to get at least one jaglion!

Was that higher or lower than you guys expected With those odds, I wonder if it would be better to just sell all my boosts and not risk it