staph has such a weird, like...callousness towards animals?
i don't think callous is the right word. ignorance? either way, she's just weird about animals, especially for someone who claims to be one with nature or whatever the fuck. i don't think it even occurs to her that she can personally help the kitty. lest we forget the tale of Edith/Fuzzy, the stray that hung around the frig's house that they liked to headcanon as peetie's girlfriend. yarbs would make tweets like "the poor thing is out alone in the rain, i really don't think she has an owner

" and just...didn't do anything. eventually they found out the cat's name is Fuzzy and belonged to the neighbors, but it took them so long to figure it out. it just never occurred to yarrow that yeah, a cat alone out in the rain is sad, but she could help the poor thing by bringing it in, or calling animal control!
even if she can't/won't keep the kitten she could give it food, or call an animal shelter/animal control, or try to catch it and then keep it in a separate room from siggy until they can get it to a shelter or find a home. or maybe she could keep it. yarrow has to know about the cat distribution system, right? i'm sure she could bullshit some loki story about how he wants to invite some youthful vigor and chaos into the Brown household and it's fate that she saved this cat.