Where are you, Magic Cavy?

First of all, chance to Magic Cavy appearance:

• 0% if dead mob is elite or boss (UnitSex("target") >= 3)
• 0.5% if level of player (PL) higher than mob level (L) more than 10
• 3% if L-PL < 5
• 4% if L-PL < 10
• 5% if L-PL >= 10
• 100% if you have Magic Cavy certificate.

Chance of Golden Magic Cavy: 5% of Magic Cavy's chance or 100% if you have Golden Magic Cavy certificate.

Egg rarity chance: 1/4, but golden cavy have at least blue rarity.

Rune egg rarity chance: 70%, 25% and 5%.

As for pet itself: they divided to "common pets" and "elite pets" (which have 3-4 active skills and +10% buffs):

• 10% chance for high-level zone, all eggs have same pet set
• 20% chance for low-level zone
• and 10% if elite pets would be choosed from per-zone set (e.g. 103623 for Logar, 103717 for Silverspring, etc.), low-level zones only.

And at last, maximum egg level by zone:

Zone	Max Egg Level
1	5
2	10
3	30
4	15
5	20
6	25
7	30
8	35
9	40
10	5
11	10
12	5
Rest	5