When retrieving a Pet Spell using GetSpellBookItemInfo, the resulting number is a spellID with flags attached.  If you use "bitwise.and" with the number 16777215, you will get a spellID that works with type "spell".  The greatest 8 bits, at least, are flags.

From the patterns I have seen and with the the least significant bit is bit 1, Bit 25 (2^24) is set for all pet spells, Bit 31 (2^30) is the state of Autocast (1 = Autocast on, 0 = Autocast off), and Bit 32 (2^31) is if the spell is castable or passive (1 = castable, 0 = passive). 19:48, October 22, 2019 (UTC)

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