lactation cookie question

I made a bunch of lactation cookies today. I found the recipe on this board, so thanks ladies! Anyway I was wondering how many I should eat a day in order to increase my supply? My supply has been decreasing slowly over the past month and we had to supplement with formula, which makes me feel like a failure. I have been taking fenugreek but that isn't enough. My son is also not wanting to nurse for very long and isn't getting all he needs in that time, so I have been pumping and giving him a bottle instead of nursing during the dayhe nurses well at night so I can make sure he gets what he needs. He lost weight and is only in the 4th percentile for his age in weight so it is important that I get him to eat. I would love to make enough that I can stop using the bottles and just nurse him again. I think he likes that he can get the milk so fast with the bottle that he doesn't like nursing very much anymore. Any advice of any kind would be welcomed.

Thanks from a long time lurker!