dogs hear and smell really well, according to science

dolphins have brain size similar to dogs, but with large sonar portion

https://theconversation.com/russian-spy-whale-the-disturbing-history-of-military-marine-mammals-116305

nostr:note15peudymmqjpprhp6qq700lx0r9mfgszq5vjv2g7h44rc2c7sn7mqx5zmwd