In the past, particularly in English and United States history, people with developmental, mental, intellectual and physical disabilities or illnesses were subject to euthanasia. Personally, I do not think any living thing should be subject to such treatment, but yes it happens if that is the question. Humans were restricted from reproduction since the government feared that their "diseases" would spread. Many babies are aborted each year because the parents find out the baby has a disability or illness, if one would consider that euthanasia. But in effort to help control animal population, I suppose controlling reproduction like spaying or neutering is appropriate as there are many stray animals with no homes.
Because the humans that are cruel to animals are stupid and/or just want money.
they deserve to die just for trying it
Yes. Just as humans can catch aids from certain animals.
No i believe they do not cause humans get oxygen from trees animals really are not different from humans so animals get the oxygen from trees just like humans
Not really. Humans are just a specific type of animal.
non active euthanasia is the same as assisted suiside :)active euthanasia is just plain old suiside :)
Just because certain animals were unfit for human consumption did not mean that those animals did not deserve to live.
Actually, humans are counted as animals, humans aren't the main living things on earth. Humans are mammals, just like the other breathing, furry, animals out there.
no they do it mostly for animals
Yes, animals can get cancer just like humans can.
Yes, humans can but aren't often prey to other animals. Of course they are not prey to everything just certain animals.
Animals' gender is no different than a humans'. Animals can be male and female, just like we are.