I have run out of hay because the bag I ordered hasn't yet arrived when I thought it would have. The only bag they had in my local store was Burgess excel feeding hay. It says 100% Timothy hay on the front but also dried fresh grass for rabbits above that. My chins won't like it, I know they won't, but is it ok to give it until their usual oxbow arrives? I've only got a small handfull of their current bag left and I don't want them being without so surely the excel is better than nothing?