Natural slam attacks + slam attack from zombie template?

[Raje]

Alright. So a zombie retains all natural attacks, manufactured weapon attacks and so on of the base creature. Then it also gains a slam attack at its highest attack bonus.

What if the base creature has 2 slam attacks? Does it have 3 slam attacks then? And if it's a fast zombie variant, does it do 4 slams when full attacking?

Take the Cave Giant for example. It has 2 slams as natural attacks. Add Fast Zombie variant. Do it get +1 slam for being a zombie and another slam when full-attacking?

Full attack options for Cave Giant non-zombie (feats removed):

Melee battleaxe +12/+7 (2d6+9/x3) or
2 slams +12 (1d8+6)

Full attack options for Cave Giant fast zombie (stat changes not factored in):

Melee battleaxe +12/+7 (2d6+9/x3) and slam +12 (1d8+6) or
4 slams +12 (1d8+6)

Is this correct? I'm unsure how the natural slam attacks interact with the slam attacks from being a zombie and quick strikes.

EDIT: I remembered that one can make natural attacks as part of a full attack with manufactured weapons as well, but forgoing 1 slam per weapon hold in a limb (due to the slam would not be possible, I guess the logic goes), those natural attacks count as secondary attacks then and impose the usual -5 atk bonus penalty. With holding the battleaxe 2-handed (losing 2 slams for 2 limbs holding manufactured weapon) and in addition to the full atk bonus slam from quick strikes I guess it would then look like something like this:

Melee battleaxe +12/+7 (2d6+9/x3) and slam +7 (1d8+3) and slam +12 (1d8+6) or
4 slams +12 (1d8+6)

[Hapless Mage]

I believe it gains a slam attack if it didn't have one before.

[Raje]

Hapless Mage wrote:

I believe it gains a slam attack if it didn't have one before.

It says it keeps all natural attack and gains a slam attack though. No "if it's got a slam already it doesn't" caveat, so I don't think that's true.

[cwslyclgh]

It only really matters whether it has 2 slams or 3 available if you use the fast zombie variant... normal zombies can't make full attacks, they are limited to one move or standard action only.

I agree with hapless mage that the zombie template is not meant to add slam attacks if the base creature already had one (simply because it wouldn't matter at all given a zombies permanently staggered condition)... I think the wording is more a problem of not accounting for the fast zombie variant when writing up the template.

in the end whether you give a fast cave giant zombie three slams on a full attack or four slams on a full attack it would probably not be enough of a change to adjust its CR any further... so just pick one and go with it.