Thank you for writing:
It sounds like you relative is just trying to get you upset. Therir comments are ridiculous, and your suggested answer wasn't wrong, but please take a look at:
The second question is simple. They only breed the billions of animals to kill them for food and other exploitive purposes. If they stopped breeding them, there would be relatively few of them left.
Only hard of heart indulgent people want flesh to eat. They simply don't care that the animals are suffering.
There is more than enough plant food to go around.
In the Love of the Lord,
Frank and Mary