Yes.
Fiddle damage comes from ult and getting crows to bounce off you with drain. If he is poking with crows dive him. All he can do is fear. With one point into drain the damage and healing is laughable. You want to poke fiddle and cause him to drain minions to heal. This sounds weird but it cost so much. If you don't level drain the heal is low and might take 2 cast. If you do then it cost a lot of mana.
Fear is 65, 100 for drain and 70ish for crows (going off my head but might be incorrect) For full damage he needs about 240ish or more depend on level of spells. So when poking the secret is to draw all the spells with little damage. After the crow run at him to force the fear. it will be .75 sec. But it drain 65 more mana. After two times of doing this you will see he is in an issues. Use more mana and be under 50% or use his pots. If he uses his pots you won. he can't just keep crowing at this point. Make him waste 3 spells. and you got him needing to back for mana.
Two things to know. If fiddle builds damage mage items. he is a mage bot lane. want for help because its two carry vs one and a support. Its too much damage. Let them push the turret and jungle gank.
If he builds support items he is a CC bot. Low damage and blows up.
As a mage build the point is not to feed the lane. because once mid game hits he has no help for the carry and no gold/mana for a mage. You can play safe not die, lose your turret but still wreck them because you have an under power mage and adc with no help running around.
Fiddle does really well against mages and "other" bots due to no sustain. Adc with footwork,
kind of counters his poke. This is what will define you as a better player. Can you change you build / mastery to give you the advantage?
If you have having problems just get
and level shield. Cast it on you carry and tell them to solo fiddle and laugh.
Guardian talent will help a lot too against fiddle to eat the crow bounces.
Now if you play sona or vel bot he will just counter you. Just sit back and wait for mid game.