How to deal with abbreviations like 'etc.' at the end of parentheses which are closing a sentence?

The dot in etc. is the dot for the abbreviation; the solutions are:

• If the abbreviation is outside of parentheses, you use only one dot, because it serves for both the abbreviation and the sentence-period:

I've got many animals, such as dogs, cats, etc.

I've got many animals: dogs, cats, etc.

• If it's inside the parentheses, like in this case, then you should use two dots, since one is for the abbreviation, the other is for the sentence:

I've got many animals (dogs, cats, etc.).