Had the silliest idea of the entire boo squad being hybrids, but none of them realizing that any of the others are until one by one Reader slowly puts together the dots.
Belgian Malanois Hesh who always has on a beanies to hide his ears, and pants that are purposefully a bit loose in the back to hide his wagging tail. You figure out he's a hybrid when one early morning he forgot to tuck his tail into his pants. It's cute how easily excitable he is, but any bit of teasing instantly makes him clam up again which sucks because you'd love to call him a pretty puppy.
Golden Retriever Logan is the next to be found out, but it really wasn't his fault. In washing mud out of the helicopter's rotors, Kick had gotten distracted with the hose, to the point where he was bullying Hesh with it. Logan had been walking with Keegan, but the moment he caught a glimpse of the spraying water he sprinted like a madman to join his brother in attcking it. When asked, all he would sign was 'Enrichment'. The only way he managed to hide his features so well was because his tail and ears were ever-so-slightly longer than Hesh's, and would easily fit under fabric without any fuss.
Brown Bear Merrick who doesn't really have any physical traits outside of being large and hairy, but mentioned it offhandedly after Hesh and Logan are found out. It made a lot of sense, especially considering how much raw fish he ate. It also explained how he could sleep so easily despite being in an active warzone. He gave a mean-spirited laugh when you said he had an unfair biological advantage, telling you to "Get better at sleeping, then.".
Desert Horned Lizard Kick who genuinely didn't know he was a hybrid until, when snuck up on by an enemy on a mission, his eyeballs shot blood. Like Merrick, he didn't have any physical traits indicative of a hybrid, but unlike the bear he completely misunderstood his instincts. He grew up in the south, there was no shortage of warm places for him to lay down on. It explained a lot about himself, though. Like why he always got so lethargic during tje winter, or why his diet felt so unfulfilling. A specialized smoothie mix meant for bug-eating hybrids and a heat lamp for when base got cold was thankfully enough for him.
Mountain Lion Ajax who, upon Merrick's confession, decided to come clean himself. He didn't have any ears on the top of his head, but his tail was long and fluffy and all across his skin were patches of soft fur that were usually kept hidden. His biggest problem? Cougars are usually nocturnal. Fantastic for night missions, but since most missions were in broad daylight he had been fucking up his sleep schedule. Like Merrick, it explained a lot about the man- like why he ate so much gamey meat, and why he preferred recon missions where he could 'stalk his prey' as Hesh had put it.
Black Cat Keegan who never says anything, but noticeably bristles when anyone other than Ajax touches him. It isn't until you walk into Keegan's room, looking for tips on sniping and instead finding the sniper curled up against the cougar, that you finally understand. His jet black ears and tail match his hair and are also adorable give away just how genuinely relaxed he is. Turns out, cat instincts don't differentiate between big or little cat, and the reason why the two are so close is because of hybrid reasons!
Belgian Malanois Elias who is assumed to be human for the longest time. He doesn't have any physical features, and doesn't display any signs of instincts or even a differing diet. Turns out, an early mission ended up with his ears and tail lopped off. He still had his instincts, but after Rorke went missing he slowly suppressed it all over time. Doesn't like to talk about it much, but you can tell in the way he watches over the others quietly that he misses it.
