Rule of thumb is to feed one food item the same size or slightly larger than the largest part of your snakes body. I personally think a pinkie would not be enough food for a 2 month old BP. If you don't have access right now to something larger then feed it 2 or 3 pinks (better than nothing) Feed it and when it takes the first one down offer the 2nd. IMO I wouldn't even worry about FT until you get him established on a regular feeding schedule, unless you can get some FT rap pups or hoppers now to try.