I've got a terrain-enclosed Meadows base next to Black Forest & Plains (my "Plains farmhouse" next to terrain-enclosed "Plains farmland") with maybe 20 or more wolves inside & maybe 10 outside & a separate terrain-enclosed lox pen with maybe 8 lox at any one time, rarely have (either) deathsquito (or fuling) incursions within the enclosed areas.

https://steamcommunity.com/sharedfiles/filedetails/?id=2854568772
https://steamcommunity.com/sharedfiles/filedetails/?id=2854567775
https://steamcommunity.com/sharedfiles/filedetails/?id=2854568069
https://steamcommunity.com/sharedfiles/filedetails/?id=2854568625

Outside though, I've had tame lox & such just auto-attract deathsquito spawns that target them until they eventually die - not so nice when a pair of lox sire a calf & the calf is dead less than a day later due to fresh spawned group of deathsquito drawn to obscenely selectively easy prey (AI preferential treatment Irongate?). If the lox would just be able to eat berries that are picked & off the bush on the ground or even eat them straight from the bush but the lox rarely notice the picked berries (like 20% chance to notice one right under their noses). I literally would have to put one berry down per sq. meter of ground all over the plains before I'd have a targetted lox do more than stand glumly & take the damage when it isn't attacking or running. The terrain-enclosures on the lox though have to be quite high/deep or you get them building lox pyramids & trying to pretend not to escape while in fact doing nearly everything necessary for a breakout. But really the AI has to be coded to escape despite them looking for all the world like they want you to believe that the programmers hadn't coded to make them seek to perform a large hairy H. Houdini as if by complete accident.