Asalam Alaikum Warahmathullahi Wa Barakathu Hu,
In The Name of Allah, Most Compassionate, Ever Merciful
1. Everything in the heavens and in the earth glorifies Allah. His is the entire kingdom and His is all the praise. And He is All-Powerful over everything.
2. He is the One Who created you. Then (someone) of you became a disbeliever and (the other one) of you became a believer and Allah sees best the actions that you do.
3. He is the One Who created the heavens and the earth with a rationale and purpose. And (He is the One Who) gave you shapes and then did up your shapes. And (all) have to return to Him alone.
4. He knows what is in the heavens and in the earth and (also) knows those things that you hide and that you disclose and Allah knows best (also the secret) matters contained in the breasts.
Narrated Usama bin Zaid: Allah's Apostle sent us towards Al-Huruqa, and in the morning we attacked them and defeated them. I and an Ansari man followed a man from among them and when we took him over, he said, "La ilaha illal-Lah." On hearing that, the Ansari man stopped, but I killed him by stabbing him with my spear. When we returned, the Prophet came to know about that and he said, "O Usama! Did you kill him after he had said "La ilaha ilal-Lah?" I said, "But he said so only to save himself." The Prophet kept on repeating that so often that I wished I had not embraced Islam before that day.
►Volume 5, Book 59, Number 568: (Sahih Bukhari)
Subhan Allah this is an explicit proof that any Muslim who testifies by saying "La Ilaha Il Allah" cannot be declared as Mushrik, do the extremists still claim to know more than Prophet (Peace be upon him), rather Quran itself?
by tacking acount of above things one can not say a person who testifies There is no god but Allah is not a Kaffir, but ahadeeth are saying one to become complete Muslim has to love Prophet Muhammad Peace Be Upon Him more than any thing else in this world and testify that he is Messenger of Allah.
and, moreover for your question since we don't know the language or communication of animals we don't know which is believer or unbeliever so which is not in your hands leave to Allah - Inna lillaahi Wa Inna Ilayhi Rajiyuun.
And Allah knows best.