Complex sentence: Chloroxylenol is not significantly toxic to humans, is practically non-toxic to birds, moderately toxic to freshwater invertebrates and highly toxic to fish and cats and should not be used around them.
Split into simpler sentences: Chloroxylenol is not significantly toxic to humans, is practically non-toxic to birds, and is moderately toxic to freshwater invertebrates. It is highly toxic to fish and cats and should not be used around them.