the first betta ive adopted (since pitifully trying to keep them as a kid, ill confess), was a petco baby betta. took him home first weekend of july i believe. we've noticed no deformities, though i am in no way the fish guru some people here are. i am actually quite pleased with his size and fins and colors :)
this is a collage i made of him over time
however, i have noticed him to be much lazier than the betta i got as an adult. we picked up a sickly guy from a local grocery store, and he immediately flourished into the active exploratory betta you expect to have. baby blue, despite all signs of great health, is just a lazier fish. same temp tanks, been in both a bigger and smaller tank than the other. just naturally lazier is the only explanation. still very cute and playful though.