Petz 4

Petz 4 is the fourth installment to the classic Petz series and one of the most commonly used versions of Petz to this day. It was developed by PF. Magic and published by Mindscape in 1999.

Gameplay
Unlike the other three games, Petz 4 didn't have as much major advancements. All that was added was a travel log, a voice recognition feature, some new playscenes, clothes and toyz; and non-breedable pigz and bunnyz.

Reception
Despite this, it is the most commonly used Petz game, because:
 * It is more easier to get
 * It is more stable than Petz 5
 * It has more features than the previous Petz
 * It is backwards-compatible and forwards-compatible with the previous Petz games and Petz 5 respectively