anthro athletic athletic_anthro athletic_male beak bound clothing cuff_(restraint) feathers growth laboratory male muscle_growth panties restraints science solo test_subject underwear birdovo falcon_steve_(birdovo) avian bird falcon falconid hi_res
Muscle growth experiment. (part 1)

The experimental falcon will be injected with a prototype of a new powerful steroid.

after injection: https://e6ai.net/posts/56762?q=birdovo