Mage Pet - Con Question

[Beldon]

So my mage just hit 16! woot! Got my new pet and summoned / reclaimed until it conned Yellow. Once I hit 17, I will summon / reclaim until I get the White one....Once I hit 18 though - the pet would con blue whether it is 16 or 17.... Is there any way to make sure I get the best one? Been using the water pet if that helps....