You'll need to click the (+) next to the Male Slots. :)

Example:
Male Slots: 0/0 (+)


Also caves do not expand your territory, they are more like folders for your lions!

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FAQ: How do I get more territory?

To expand your pride you need to focus on Territory Slots and Sub Male Slots. Territory Slots work as 1 territory to 1 adult lioness. Cubs and adolescents do not count towards your territory. Territory can be purchased on your den page up to 20 slots, and then you can PvP up to 40 slots. Note that you can also PvP for slots 3 - 20 as well, which tends to be cheaper. For slot 41+ you will need to spend GB.

A sub male slot holds 1 adult male. The first two slots cost 500SB each, then after that slots cost GB to purchase. Purchasing is the only way to get a Sub Male Slot.

Below is your den statistics, I've highlighted the boxes referring to territory and sub male slots:

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@Kraft

Thank you, but I think I already read it. I'm not sure where I need to go in order to buy those slots?

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Thank you a lot!

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I'm so confused I press the + next to the male slots but it won't add anything and it's still on 0/0 but I have a submale aging tomorrow an I don't want them to leave my den yk?

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