The pellets are completely legal to buy and order (for your cows) in the United States. Moooo.
However, once converted for human under the Controlled Substances Act constitutes a schedule III felony, if intent to sell is alleged.
Personal users are often charged as dealers. With the changes mandated in 2004, there is no difference in Schedule III (i.e. barbiturates, LSD precursors, veterinary tranquilizers like ketamine and narcotic painkillers like Vicodin) narcotics. All substances listed under Schedule III are treated equally.
"In the Controlled Substances Act, anabolic steroids are defined to be any drug or hormonal substance chemically and pharmacologically related to testosterone (other than estrogens, progestins, and corticosteroids) that promote muscle growth."
The defining initiative for an act of felony occurs when it comes to illegal distribution (with intent to sell) following conversion of said substance.
Without a valid prescription on hand, one can still be charged with illegal possession.
'Many states follow the federal guidelines with charging defendants arrested for possession of anabolic steroids using the guideline of
1 pill = 1 count or ml/cc equals 1 count. The federal guidelines when applied to anabolic steroids may add up to ... high number of counts. For example,
a singe week cycle using, Dianabol tablets may result in 200-450 criminal counts.'