Pacifism is the unspoken first law of the spiritual world. There is no pain infliction there, no conscious exploitation, only conscious service and conscious giving in love and appreciation, no anxiety, no worries. Like imagine a deer walking up to you asking for drink of water because he has no hands and the well is deep. You give it, he thanks you, you kiss, and part. You sleep with a lion, who uses his teeth to crack nuts for the family all day long in the courtyard while he tells your kids stories from the animal kingdom.
Lions can instead eat hard grains and so on.
Yes, animals can talk and be vegetarians, but like humans, they're getting dumber every generation. It used to be you could talk to them, but they're losing their cultures and over integrating and so on. The contact with humans of the modern type has been bewildering for them completely, because they were used to the humans being full of light, but no more. The last shall be first.