Several months ago I switched my piggies from low quality pellets to Oxbow cavy cuisine. I noticed within the first week it was causing calcium deposits so I returned it and purchased Zupreem pellets. While it's not the best on the list it's certainly better than what they were eating before. Lately I guess they've become tired of zupreem as they haven't really been eating much of it. Yesterday I bought Oxbow natural science. In comparing the ingredients it looks like it contains less calcium than cavy cuisine. Has anyone every tried it? Also the batch of oxbow hay I got was really soft and has some brown in it. Is that normal? the last batch of hay I got was crunchy and didn't have much brown in it...I'm wondering if I should exchange it for another bag...