All Animals Suddenly Realize the Benefits of Being Cute Pets
All vertebrate species on land immediately discover the benefits that cats and dogs enjoy, being pampered, not having to hunt for food or defend shelter, etc. They are cute-lusted and will do anything to make their species the new standard of household pet. They all know what cute is and know about things like cat videos on youtube. They all have slightly boosted intelligence, are smart enough to use a litter box, and will learn from trial and error. They will not do anything that could harm themselves, their species or humans. These are not guard animals.
Whichever species humans prefer at the end of each round wins.
R1: Animals have 90 days of prep. The Animal kingdom is all on board for this. Birds are helping people get dressed like in Disney movies, Grizzly bears are rolling on their backs asking for belly rubs, lizards are trying their best to look like a real life Geico commercial, etc.
R2: Animals have had 1000 years to choose mates who will give them offspring with most adorable characteristics. Think in terms of wolves on their way to becoming dogs. Large animals like elephants will get smaller, tiny animals like salamanders could get larger.
R3: Same as above but a species may cross breed with one and only one other species which must be relatively close genetically. A giraffe could breed with a deer but a lemur could not breed with a frog.
For each round, who is the new preferred human companion?