I have seen some bags of Oxbow hay at PetSmart that were yellow. Yellow hay doesn’t necessarily mean that it’s bad, though. I use several varieties of Oxbow hay, as well as American Pet Diner Timothy Gold, and right now I also have some Small Pet Select hay. I buy my Oxbow and APD from drsfostersmith.com. It’s always fresh and green, and I’ve never gotten any bags of Oxbow that were very small strands. Hay can be extremely variable, though, depending on the growing conditions, the time of year it was cut, and how long ago it was cut. The Small Pet Select hay that I just got, only cost me the shipping charge, and it is very long strand hay. A bit too long for my liking, because it’s kind of hard to manage the long stiff strands.
I used to give the Oxbow joint support tablets to two of my elderly bunnies. I now give the digestive tablets to my current bunnies, after both of them had a short bout of stasis. There have been several threads here with people asking if they really work or really help, and no one knows for sure, but most bunnies will enjoy them as a treat if nothing else. The joint tablets had ingredients in them (turmeric) that are known to reduce inflammation, so hopefully they did help. The digestive tablets have chicory root and ginger root, which are supposed to help with beneficial bacteria and GI tract mobility.