Yeah, the white stuff is more than likely urates, I think regurge would probably be alot more gross (never seen regurge so I really don't know). But pics would help to definately identify it. And my girl doesn't always poop everyweek either, even though she has not missed a meal for me. Although when you do spot checks on your BP's enclosure, make sure that you check everywhere.... in hides and around any "cage furniture". My girl likes to try to hide her poo sometimes it seems.Silly thing. Although if you are that concerned, I have read on other threads here that sometimes soaking your BP in warm water will help them go poo as well, so that might be a thought for you. Anyway good luck with the check up!!