What I think about...

if you have not necessary care, the life for this "pet" will be horrible., also , many of this are extracted from the nature (parrots , snakes , fishes, turtles, rodents) and a lot of them die in the way to the store. :(
2) Killing stray dogs?, this is NOT a solution for ME! I don't know why the "human being" have the right to do with the others nature's creatures all that HE want. It is not fair! kill for kill? This is a mess!

3) Clonig? absolutely not agree. I think that each creature is unique and perfect as God created it. Soon or later all we going to die , is the nature law , who are we for change this , and for what? Nature is perfect , exist a balance. Create someone identical to you , for don´t say part of you, or yourself , it has to be really striking : see it , touch it. It´s like looking to you in a constant mirror. And for what ?, when you need a organ transplant , it will have to be necessary kill your clone, it will be like a murder by yourself! , this is very scary!...:$

yes to : when the fetus is dead (fetus infeasibility).
No to: pregnancy not wished by sexual violation or irresponsibility.
5) Recycling? the best , off course , YES!
I think in Chile it must to be more culture about these! ,must recycling centers , at least one in each commune, and big centers like malls could transform all the energy that them consume daily into more energy, I don't know how say it specifically , but it is like "recycling energy".