Are questions about human-animal communication on-topic here?
Of course, still with regards to language learning. (e.g. learning to communicate with animals, gorillas learning sign language, etc.)
In general, no.
If a question about animal communication relates to language learning (perhaps we learn how to do language training based on observations of animal communication?), why not?
If you're asking about how to teach animals human language, that may be a grey area. I can't imagine there being either a) enough expertise among us to answer such questions, or b) enough interest in the topic for there to be questions about it. But if I'm proven wrong, I'm completely willing to address that issue if/when it arises.
So TLDR: My suggestion is to wait until it becomes an issue to address it.