pets available at certain time

[zhiichiro]

i have some questions about the pet available on certain time..

1. when i put the "date" is it mean that my pet will be available on that day? or it will be not available on that day?

2. how can i remove an adoptable on the list of available pets for adoption, but everyone who adopted it will not loose it?

3. how can i change the previos image of the pet?
because when i click edit, and try to change the image, only one photo is available to change it..
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when i try the "date" one,
i tot it will be available already for others to adopt it. and the date i posted is the expiration. meaning, it will be removed automatically on the adopt page, but everyone who adopted it can keep it.

but it didnt shown on the adopt page.
so i change the date, i enter the present date, and it is shown.

how can i set date for the pet, so it will be removed automatically but everyone who adopted it can keep it, and will not loose it?