I just had an idea- alternate universe where House and the Animorphs co-exist. The Animorphs have planned the infamous oatmeal attack, but to be safe, they're testing it on a Yeerk pool far away from their local one where Tom/Chapman go. They go ahead with the attack and it succeeds (somehow they do it stealthily so don't get caught).
Suddenly, the genius doctor House is getting an awful lot of patients who seem to be having some kind of mental problems. He takes it a) because it's interesting and a bit different to the usual problems he sees and b) nobody else can figure it out so of course he will get more respect for figuring it out and of course he will get boasting rights forever. As he continues to see a large amount of patients, the Animorphs realise that something's up. They go check on House, make sure he's not a Controller/ if he can save the hosts, they go to check if he's in danger because the Yeerks will want to take out a man who can save hosts from oatmeal-addicted Yeerks. House is a very perceptive man so he may well notice that weird things are going on- animals seem to follow him around. Then to get his trust they make friends with him, might even give him the morphing power if he really needs to defend himself or get out of bad situations.
Just a thought! Feel free to change it up or ignore it