How many BPs is "too many"?

Oops, read the title wrong(read it as 'How many BPs do you own' XD) and voted 0-5. XD I don't mean that.

honestly though, I think you only have too many when you can't take care of them.

If you are unable to provide proper care for the animals, you have too many. That number could be one, or it could be one hundred.