"Did Ditto spawn rate drop after the Thanksgiving event?"

#PokemonGO: During the Thanksgiving event, I was catching 1-2 Ditto per day, playing at random. I was hoping to get one with good IV to use all my candy on, but have not caught another since the event even though I have caught over 250 Rats pidgeys, ect... since the event.I know they are still out there, as local players have caught some, but I was wondering if the spawn rate dropped. via /r/TheSilphRoad http://ift.tt/2h67CSy