[observer]

Try wrapping the pills in velveeta-type cheese. Also, make a few balls of cheese that DON'T have pills in them. You could use the rolled dog food you've already tried the same way. Make a happy game of it! Give her a couple of those without the pills, then the one with the pills, then another empty one in as quick a succession as she can handle. She should be happy enough for the cheese balls she won't notice the pills.

I don't know about the benefit of flaxseed oil, but assuming it is helpful, does it come in capsules? Then you could do as above, if it works for her.