Do "Effective Druid Levels" stack with each other for Animal Companions?

I'd like to create a character build that derives the animal companion feature from two non-druid classes, nameably Mad Dog archetype Barbarian and Ranger.
RAW, the rules state "The druid's class levels stack with levels of any other classes that are entitled to an animal companion for the purpose of determining the companion's statistics." which seems to imply that only levels of actual Druid stack with other classes that have an "effective Druid level".

My question is: given that the ruling on Ranger and any other pseudo-Druids with an animal companion equivalent ability state "This ability functions like the druid animal companion ability", can it be ruled that multiple classes with effective Druid levels stack with each other as a Druid/x multiclass would?

AFAIK only if you pick an animal that is allowed by all classes.

They stack as long as the critter is on boths lists but you can't have a mad dog barbarian 1 cavalier X just to open up a tiger as a full leveled mount.

HERE is the FAQ they're referring to.

AFAIK only if you pick an animal that is allowed by all classes.

This is what I was looking for. Thank you :)

HERE is the FAQ they're referring to.

I did know it existed and checked the CRB FAQ, but was fairly sure from the start that it wasn't there, even if it seem more a FAQ that should apply to druid et al. and not cavalier et al.

Please place a "favorite" in this old post about adding a search function to the FAQs. Maybe if we get enough like it will be implemented.

Need to search the FAQ by keyword?

Need to search the FAQ by keyword?

But that requires "effort".

Need to search the FAQ by keyword?

<blush> Linked to by Nefreet!

Anyway, I was getting ready to post this again (in this thread) when I noticed the link. To add to my earlier advice, in Chrome you can use this extension to make these searches even easier. I also have an Archives of Nethys search setup with it.

I thanked you in that thread, too.

I use it all the time now!!

<3