Let me first point out what is harmful about electric current:

• alternating (ac) current in the range of 20-200Hz is dangerous, because (even for miliampere current values) it may interfere with the oscillations of heart, causing fibrillation and subsequent death, if the normal blood circulation is not restored within a short period of time. This is typically the cause of death in the domestic accidents associated with electricity (leaving apart falling form a ladder when getting shocked).
• direct (dc) current is harmful only at high values, such as 1 ampere and greater. These are rare in domestic conditions, but not uncommon in industrial setting. In this case the current flowing through the body simply paralizes miscles, leaving the eprson conscious, but unable to release the wire. The harm results from being heated by currents, resulting in lethal burns.

Touching the electric power line certainly involves the ac effect, and in some cases may imply the dc effect as well. If the animal simply died from the heart fibrilation, the damage to its tissues due to the current is virtually non-existent, and it will decay normally. If the current was high enough to cause burns, then the current stops once the tissues along its path carbonize and stop being conducting. Burned tissue is inorganic matter, which is of little interest to micro-organism. However, anything that was not burned, will decay normally.

Let me first point out what is harmful about electric current:

• alternating (ac) current in the range of 20-200Hz is dangerous, because (even for miliampere current values) it may interfere with the oscillations of heart, causing fibrillation and subsequent death, if the normal blood circulation is not restored within a short period of time. This is typically the cause of death in the domestic accidents associated with electricity (leaving apart falling form a ladder when getting shocked).
• direct (dc) current is harmful only at high values, such as 1 ampere and greater. These are rare in domestic conditions, but not uncommon in industrial setting. In this case the current flowing through the body simply paralizes miscles, leaving the eprson conscious, but unable to release the wire. The harm results from being heated by currents, resulting in lethal burns.

Touching the electric power line certainly involves the ac effect, and in some cases may imply the dc effect as well. If the animal simply died from the heart fibrilation, the damage to its tissues due to the current is virtually non-existent, and it will decay normally. If the current was high enough to cause burns, then the current stops once the tissues along its path carbonize and stop being conducting. Burned tissue is inorganic matter, which is of little interest to micro-organism. However, anything that was not burned, will decay normally.

Some also these relevant posts:

• Why does electric shock freeze up muscles?
• Why does an electric shock contract the muscle?