abs after_transformation anthro athletic beak biceps bodily_fluids bound breath clothing cuff_(restraint) deltoids feathers growth laboratory male muscle_growth muscular muscular_anthro muscular_male navel neck_muscles pain panties panting pecs restraints ripped_muscles science serratus solo sweat test_subject trapezius triceps underwear veiny_muscles birdovo falcon_steve_(birdovo) avian bird falcon falconid absurd_res hi_res
Muscle growth experiment (part 2)

After a painful and intense muscle growth, the prototype of the experimental steroid significantly increased the muscle mass of the test subject. During the experiment, the drug needed only 10 minutes to train the body of the test falcon to the level of a professional athlete.

Side effects: 
Severe pain during the drug's action.
Increased sweating.
Nausea.

before injection: https://e6ai.net/posts/56761?q=birdovo