D'ont increase life for killing merely
Most of lives which were killed are puppies and kittens.
Dogs and cats is pregnant and breed one after another
in the mating season, because they can't control it
if we leave untended them.
It will be good that possible to keep them as one of your family,
or find their foster parents if they breed,
but it's very difficult to do it in fact.
So please operate them for contraception or castration
in order not to increase the life which be killed any more.
In the case of female, to operate for contraception,
it's possible to prevent from some illnesses due to womb,
ovary the mammary gland in their old age.
They will make the room dirty when they experience menses.