Will definitely loves animals and I always picture him with a dog post-canon, but I present you this: Chance who claims he doesn't like cats (they're way too independent and act like smug little bastards), until one day he comes across a stray kitten in a cardboard box, left to die in the street. It's raining and the kitten looks like a sad, wet mop head.
Chance's heart does a funny thing and he immediately knows he can't leave it there, like "Nope, that's it, you're coming with me little guy".
When Will hears the sound of keys and turns his head towards their shared apartment door, he is met with the sight of his drenched boyfriend protectively holding a kitten in his big arms like he personally gave birth to it.
"We're fathers now, babe." He says very seriously, and Will snorts fondly.
(Cue to Chance learning how to take care of a kitten and worrying 24/7 he's gonna accidentally kill him or something. "You're doing great, honey." Will reassures him with a pat on the head when he's not busy teasing him.)

















