Labs are a kick. I'd forgotten about an incident with a lab pup back in about 1968 but the stories reminded me. I was at aguy's house and he held a big chunk of hashish down for his lab pup to sniff and it went the same way as your bro-in-laws salmon. One gulp and the pup was damn goofy for about 4 hours and then slept for about 12 hours straight.
Nobody wanted to poke his poo to see if there were any chunks left.
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"I didn't care what she didn't 'low--I would boogie-woogie anyhow" John Lee Hooker