If you look at them, disappear at all, they are beings also

[Rachel Adams]

Should there be "and" before "thirst" and do these parts sound natural "they are beings also", "if you look at them" "disappear at all"?

"Animals like people feel pain, sadness, joy, thirst. They must not be tested to verify products and vaccines. They are beings also. If you look at them, they become fewer and fewer, and soon they will disappear at all."

 

[teechar]

Should there be "and" before "thirst"

Yes, because it's the last item in a list.

and do these parts sound natural: "they are beings also", "if you look at them" "disappear at all"?

See below.

"Animals, (just) like people, feel pain, sadness, joy, and even thirst. They must not be used in testing/experimentation tested to verify develop new (cosmetic) products and vaccines. They are beings also living beings.

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If you look at them, they become fewer and fewer, and soon they will disappear at all."

I don't understand what you mean by that. Can you explain it using other words please?

 

[Rachel Adams]

Yes, because it's the last item in a list.

See below.

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I don't understand what you mean by that. Can you explain it using other words please?

I meant they are becoming extinct. It can not be expressed by "If you look at them, they become fewer and fewer, and soon they will disappear at all", can it?

 

[emsr2d2]

You are suggesting that if I look at an animal, it starts to disappear and becomes extinct. I refuse to take the blame for any species' extinction simply by looking at them!
You definitely need to reword that.

 

[Rachel Adams]

You are suggesting that if I look at an animal, it starts to disappear and becomes extinct.

I refuse to take the blame for any species' extinction simply by looking at them!
You definitely need to reword that.

What about "if you check the number of some animals and compare it to their current number you will see that they are becoming extinct". I don't like this sentence, either.
I think "Some species are becoming extinct" is a better version, isn't it?

 

[teechar]

The problem is that species extinction is not the result of animal experimentation! I suggest you think of another idea.