Thanks everyone for your suggestions!
I submitted once to Boys Quest and they held my article until publication to see if there was room. I'll have to try them again, especially once they update their themes.
Highlights makes me nervous, because of their request for experts and references. I wrote a dog agility article a few years ago with them in mind, even had photos and permissions of young people. Unfortunately, I never sent it, and now the permissions are probably too old. Still, I did grow up reading Highlights, and so should try them too.
90 markets for animals! Wow. I obviously need to look again at my market guide.
Good to hear that many magazines are open to animal stories. Working with animals has been my passion for several years now and it'd be nice to combine writing with that love.
Allison